Photonics Letters of Poland最新文献

{"title":"Solution of coupled nonlinear Schrödinger equations in focusing-defocusing medium by modified perturbation theory","authors":"J. Jasiński, M. Karpierz","doi":"10.4302/plp.v13i2.1106","DOIUrl":"https://doi.org/10.4302/plp.v13i2.1106","url":null,"abstract":"The interaction of bright solitons of different orders and two different wavelengths propagating in the medium focusing for one wavelength and defocusing for the other is considered. The system of nonlinear Schrödinger equations is solved by means of perturbation theory. Application of an additional postulate to adjust both widths of the solitons and to modify the amplitude by a factor determined by the overlap integral greatly improves the accuracy of the description. The good accuracy of description is confirmed by numerical calculations. Full Text: PDF ReferencesY. Kivshar, G. P. Agrawal, Optical Solitons. From Fibers to Photonic Crystals, (Amsterdam, Academic Press 2003). CrossRef F. Abdullaev, S. Darmanyan, P. Khabibullaev, Optical Solitons, (Springer-Verlag, Berlin, 1993) CrossRef G.I.A Stegema, D.N. Christodoulides, M. Segev, IEEE J. Selected Topics Quantum Electron. 6, (2000), 1419 CrossRef J. Yang, \"Nonlinear Waves in Integrable and Nonintegrable Systems\", (SIAM, Philadelphia 2010). CrossRef Y. Kivshar, B. Malomed, \"Dynamics of solitons in nearly integrable systems\", Rev. Mod. Phys. 61, 763 (1989). CrossRef P.G. Kevrekidis, D.J. Frantzeskakis, \"Solitons in coupled nonlinear Schrödinger models: A survey of recent developments\", Reviews in Physics 1 (2016), 140 CrossRef R. de la Fuente, A. Barthelemy, \"Spatial soliton-induced guiding by cross-phase modulation\", IEEE J. Quantum Electron. 28, 547 (1992). CrossRef H. T. Tran, R. A. Sammut, \"Families of multiwavelength spatial solitons in nonlinear Kerr media\", Phys. Rev. A 52, 3170 (1995). CrossRef S. Leble, B. Reichel, \"Coupled nonlinear Schrödinger equations in optic fibers theory\", Eur. Phys. J. Special Topics 173, 5 (2009). CrossRef M. Vijayajayanthi, T.Kanna, M. Lakshmanan, \"Multisoliton solutions and energy sharing collisions in coupled nonlinear Schrödinger equations with focusing, defocusing and mixed type nonlinearities\", Eur. Phys. J. Special Topics 173, 57 (2009). CrossRef S. V. Manakov, \"On the theory of two-dimensional stationary self-focusing of electromagnetic waves \", Sov. Phys. JETP 38 (1973), 248 DirectLink J. Yang, Phys. Rev. E 65, 036606 (2002). CrossRef T.Kanna, M. Lakshmanan, \"Exact Soliton Solutions, Shape Changing Collisions, and Partially Coherent Solitons in Coupled Nonlinear Schrödinger Equations\", Phys. Rev. Lett. 86, 5043 (2001). CrossRef M. Jakubowski, K. Steiglitz, R. Squier, \"State transformations of colliding optical solitons and possible application to computation in bulk media\", Phys. Rev. E 58, 6752 (1998). CrossRef P. S. Jung, W. Krolikowski, U. A. Laudyn, M. Trippenbach, and M. A. Karpierz, \"Supermode spatial optical solitons in liquid crystals with competing nonlinearities\", Phys. Rev. A 95 (2017). CrossRef P. S. Jung, M. A. Karpierz, M. Trippenbach, D. N. Christodoulides, and W. Krolikowski, \"Supermode spatial solitons via competing nonlocal nonlinearities\", Photonics Lett. Pol. 10 (2018). CrossRef A. Ramaniuk, M. Trippenbach, P.S. Jung, D.N. Christodou","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45994176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of 3D face masks with thermal infrared imaging and deep learning techniques","authors":"M. Kowalski, Krzysztof Mierzejewski","doi":"10.4302/plp.v13i2.1091","DOIUrl":"https://doi.org/10.4302/plp.v13i2.1091","url":null,"abstract":"Biometric systems are becoming more and more efficient due to increasing performance of algorithms. These systems are also vulnerable to various attacks. Presentation of falsified identity to a biometric sensor is one the most urgent challenges for the recent biometric recognition systems. Exploration of specific properties of thermal infrared seems to be a comprehensive solution for detecting face presentation attacks. This letter presents outcome of our study on detecting 3D face masks using thermal infrared imaging and deep learning techniques. We demonstrate results of a two-step neural network-featured method for detecting presentation attacks. Full Text: PDF ReferencesS.R. Arashloo, J. Kittler, W. Christmas, \"Face Spoofing Detection Based on Multiple Descriptor Fusion Using Multiscale Dynamic Binarized Statistical Image Features\", IEEE Trans. Inf. Forensics Secur. 10, 11 (2015). CrossRef A. Anjos, M.M. Chakka, S. Marcel, \"Motion-based counter-measures to photo attacks inface recognition\", IET Biometrics 3, 3 (2014). CrossRef M. Killioǧlu, M. Taşkiran, N. Kahraman, \"Anti-spoofing in face recognition with liveness detection using pupil tracking\", Proc. SAMI IEEE, (2017). CrossRef A. Asaduzzaman, A. Mummidi, M.F. Mridha, F.N. Sibai, \"Improving facial recognition accuracy by applying liveness monitoring technique\", Proc. ICAEE IEEE, (2015). CrossRef M. Kowalski, \"A Study on Presentation Attack Detection in Thermal Infrared\", Sensors 20, 14 (2020). CrossRef C. Galdi, et al, \"PROTECT: Pervasive and useR fOcused biomeTrics bordEr projeCT - a case study\", IET Biometrics 9, 6 (2020). CrossRef D.A. Socolinsky, A. Selinger, J. Neuheisel, \"Face recognition with visible and thermal infrared imagery\", Comput. Vis Image Underst. 91, 1-2 (2003) CrossRef L. Sun, W. Huang, M. Wu, \"TIR/VIS Correlation for Liveness Detection in Face Recognition\", Proc. CAIP, (2011). CrossRef J. Seo, I. Chung, \"Face Liveness Detection Using Thermal Face-CNN with External Knowledge\", Symmetry 2019, 11, 3 (2019). CrossRef A. George, Z. Mostaani, D Geissenbuhler, et al., \"Biometric Face Presentation Attack Detection With Multi-Channel Convolutional Neural Network\", IEEE Trans. Inf. Forensics Secur. 15, (2020). CrossRef S. Ren, K. He, R. Girshick, J. Sun, \"Proceedings of IEEE Conference on Computer Vision and Pattern Recognition\", Proc. CVPR IEEE 39, (2016). CrossRef K. He, X. Zhang, S. Ren, J. Sun, \"Deep Residual Learning for Image Recognition\", Proc. CVPR, (2016). CrossRef K. Mierzejewski, M. Mazurek, \"A New Framework for Assessing Similarity Measure Impact on Classification Confidence Based on Probabilistic Record Linkage Model\", Procedia Manufacturing 44, 245-252 (2020). CrossRef","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48275292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and implementation of the driver system for Hamamatsu C12880MA microspectrometer","authors":"P. Sokołowski, M. Wróbel, K. Karpienko","doi":"10.4302/plp.v13i2.1103","DOIUrl":"https://doi.org/10.4302/plp.v13i2.1103","url":null,"abstract":"Recent miniaturization developments in devices for spectroscopy have reduced greatly their costs and increased their availability for a wide range of users and applications. This paper presents the design and implementation of a driver system for a Hamamatsu C12880MA microspectrometer. The system implementation was carried out and compared using two independent microcontroller modules: Arduino Uno and STM32F411RE Nucleo. We assessed the microspectrometer system parameters like resolution and integration time, as influenced by the choice of a driver microcontroller. We present a possible application of this microspectrometer system for measurements of ground coffee beans reflectance for control of coffee roasting. Full Text: PDF ReferencesCrocombe RA. Portable Spectroscopy. \"Portable Spectroscopy\", Applied Spectroscopy. 2018;72(12):1701-1751 CrossRef Datasheet Hamamastu C12880MA DirectLink Datasheet Arduino Uno DirectLink Datasheet STM32F411RE DirectLink Hernández, J. A., B. Heyd, and G. Trystram. \"Prediction of brightness and surface area kinetics during coffee roasting.\" Journal of Food Engineering 89.2 (2008): 156-163. CrossRef","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48078604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and characterization of AFM tips with nitrogen-vacancy and nitrogen-vacancy-nitrogen color centers","authors":"Zuzanna Orzechowska, M. Mrózek, W. Gawlik, A. Wojciechowski","doi":"10.4302/plp.v13i2.1095","DOIUrl":"https://doi.org/10.4302/plp.v13i2.1095","url":null,"abstract":"We demonstrate a simple dip-coating method of covering standard AFM tips with nanodiamonds containing color centers. Such coating enables convenient visualization of AFM tips above transparent samples as well as using the tip for performing spatially resolved magnetometry. Full Text: PDF ReferencesG. Binnig, C. F. Quate, C. Gerber, \"Atomic Force Microscope\", Phys. Rev. Lett. 56, 930 (1986). CrossRef F .J. Giessibl, \"Advances in atomic force microscopy\", Rev. Mod. Phys. 75, 949 (2003). CrossRef S. Kasas, G. Dietler, \"Probing nanomechanical properties from biomolecules to living cells\", Eur. J. Appl. Physiol. 456, 13 (2008). CrossRef C. Roduit et al., \"Stiffness Tomography by Atomic Force Microscopy\", Biophys. J. 97, 674 (2009). CrossRef L. A. Kolodny et al., \"Spatially Correlated Fluorescence/AFM of Individual Nanosized Particles and Biomolecules\", Anal. Chem. 73, 1959 (2001). CrossRef L. Rondin et al., \"Magnetometry with nitrogen-vacancy defects in diamond\", Rep. Prog. Phys. 77, 056503 (2014). CrossRef C. L. Degen, \"Scanning magnetic field microscope with a diamond single-spin sensor\", Appl. Phys. Lett. 92, 243111 (2008). CrossRef J. M. Taylor et al., \"High-sensitivity diamond magnetometer with nanoscale resolution\", Nat. Phys. 4, 810 (2008). CrossRef J. R. Maze et al., \"Nanoscale magnetic sensing with an individual electronic spin in diamond\", Nature 455, 644 (2008). CrossRef L. Rondin et al., \"Nanoscale magnetic field mapping with a single spin scanning probe magnetometer\", Appl. Phys. Lett. 100, 153118 (2012). CrossRef J. P. Tetienne et al., \"Nanoscale imaging and control of domain-wall hopping with a nitrogen-vacancy center microscope\", Science 344, 1366 (2014). CrossRef R. Nelz et al., \"Color center fluorescence and spin manipulation in single crystal, pyramidal diamond tips\", Appl. Phys. Lett. 109, 193105 (2016). CrossRef G. Balasubramanian et al., \"Nanoscale imaging magnetometry with diamond spins under ambient conditions\", Nature 455, 648 (2008). CrossRef P. Maletinsky et al., \"A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres\", Nat. nanotechnol. 7, 320 (2012). CrossRef L. Thiel et al., \"Quantitative nanoscale vortex imaging using a cryogenic quantum magnetometer\", Nat. nanotechnol. 11, 677 (2016). CrossRef F. Jelezko et al., \"Single spin states in a defect center resolved by optical spectroscopy\", Appl. Phys. Lett. 81, 2160 (2002). CrossRef M. W. Doherty et al., \"The nitrogen-vacancy colour centre in diamond\", Phys. Rep. 528, 1 (2013). CrossRef C. Kurtsiefer, S. Mayer, P. Zarda, H. Weinfurter, \"Stable Solid-State Source of Single Photons\", Phys. Rev. Lett. 85, 290 (2000). CrossRef A. Gruber, A. Dräbenstedt, C. Tietz, L. Fleury, J. Wrachtrup, C. Von Borczyskowski, \"Scanning Confocal Optical Microscopy and Magnetic Resonance on Single Defect Centers\", Science 276, 2012 (1997). CrossRef F. Dolde et al., \"Electric-field sensing using single diamond spins\", Nat. Phys. 7, 459 (2011). CrossRef K. Sasaki","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44110719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of spectral properties of light sources on perceived and recorded images","authors":"J. Kusznier","doi":"10.4302/plp.v13i2.1105","DOIUrl":"https://doi.org/10.4302/plp.v13i2.1105","url":null,"abstract":"The text presents differences between the mechanism of seeing and recording images and potential sources of errors in color reproduction in recorded images. The measurements show that despite the relatively high values of indices (Ra, Rf i Rg) not all tested lamps are suitable for use on a photo set, as indicated by the value of TLCI index. The lighting requirements on a film set prioritize the quality of color reproduction, even at the expense of reducing the Luminous efficacy of a source (LES ) value. Full Text: PDF ReferencesL.T. Sharpe, A. Jagla, W. Jägle, \"A luminous efficiency function, V*(λ), for daylight adaptation\", J. Vision 5(11), 948 (2012) DirectLink K. Mangold, J.A. Shaw, M. Vollmer, The physics of near-infrared photography, Eur. J. Phys. 34 (2013), pp. 51-71 CrossRef Simunovic M. P., On Seeing Yellow The Case for, and Against, Short-Wavelength Light-Absorbing Intraocular Lenses, Archives of Ophthalmology, vol. 130, no. 7, pp. 919-926, 2012 CrossRef M. Gilewski, The ecological hazard of artificial lighting in greenhouses, Phot. Lett. Pol., vol. 11 Issue: 3, pp. 87-89, 2019. CrossRef M. Gilewski, The role of light in the plants world, Phot. Lett. Pol., vol. 11, no. 4, pp. 115-117, 2019 CrossRef I. Fryc and E. Czech Spectral correction of the measurement CCD array, Optical Engineering 41(10), pp.2402-2406 (2002). CrossRef L. Bellia, U. Blaszczak, F. Fragliasso, L. Gryko, Matching CIE illuminants to measured spectral power distributions: A method to evaluate non-visual potential of daylight in two European cities, Solar Energy, Volume 208, 2020, Pages 830-858 CrossRef J. Kusznier and W. Wojtkowski, Impact of climatic conditions on PV panels operation in a photovoltaic power plant, IEEE, 2019 15th Selected Issues of Electrical Engineering and Electronics (WZEE), Zakopane, Poland, pp. 1-6, 2019 CrossRef J. Kusznier and W. Wojtkowski, Impact of climatic conditions and solar exposure on the aging of PV panels, IEEE, 2019 15th Selected Issues of Electrical Engineering and Electronics (WZEE), Zakopane, Poland, pp. 1-6, 2019 CrossRef J. Fan, Y. Li, I. Fryc, C. Qian, X. Fan and G. Zhang, Machine-Learning Assisted Prediction of Spectral Power Distribution for Full-Spectrum White Light-Emitting Diode, in IEEE Photonics Journal, vol. 12, no. 1, pp. 1-18, Feb. 2020, Art no. 8200218, CrossRef M. Gilewski, L. Gryko, A. Zajac, Digital controlling system to the set of high power LEDs, Proc. of SPIE, 8902, 89021D, 2013 CrossRef J. Kusznier, W. Wojtkowski, Spectral properties of smart LED lamps, Phot. Lett. Pol., vol. 12, no. 1, pp. 16-18, 2020. CrossRef J. Kusznier, Changes in the Spectral Power Distribution of Light Sources for Smart Lighting, IEEE, 14th WZEE, pp. 1-5, 2018 CrossRef H. F. Ivey, Color and Efficiency of Luminescent Light Sources, J. Opt. Soc. Am. 53, 1185-1198 (1963) CrossRef F. Zhang, H. Xu, Z. Wang, Optimizing spectral compositions of multichannel LED light sources by IES color fidelity index and luminous efficacy of radiation, Appl. ","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Problems with evaluating readings of pulse oximeters used at home during the ongoing COVID-19 pandemic","authors":"A. Cysewska-Sobusiak","doi":"10.4302/PLP.V13I1.1093","DOIUrl":"https://doi.org/10.4302/PLP.V13I1.1093","url":null,"abstract":"The author presents the problems related to pulse oximetry, taking into account both the current state-of-the-art as well as her own long-standing experience in this field. The COVID-19 pandemic continues and has raised interest in home application of pulse oximeters due to their potential benefit, which may be warning of a drop in blood oxygenation due to lower respiratory capacity. However, it should be emphasized that these devices have limitations, both of a physiological and technical nature, and some problems related to the reliability and scope of the measurements still remain unresolved. Phenomena which limit processing reliability of the quantity to be sensed, i.e., the oxygen saturation SaO2%, are presented. Specific groups of affecting factors are distinguished in an approach of their contribution to the measurement uncertainty components. Full Text: PDF References J.W. Severinghaus, \"Crediting six discoverers of oxygen\", Adv. Exp. Med. Biol. 812 (2014). CrossRef F.A. Duck, \"Physical properties of tissue: a comprehensive reference book\" (San Diego, Academia Press 1990). CrossRef J.G. Webster, \"Design of pulse oximeters\" (Bristol, IOP Publishing Ltd 1997). CrossRef A.A. Alian and K.H Shelley, \"Photoplethysmography\", Anesthesiology 28, 4 (2014). CrossRef N. Moukaddam and A. Shah, \"Psychiatrists beware! The impact of COVID-19 and pandemics on mental health\", Psychiatric Times 37, 3 (2020). CrossRef S.S. Morse, Proc Nat. Acad Sci 104, 18 (2007). CrossRef W.A. Schrading, B. McCafferty, J. Grove, and D.B. Page, \"Portable, consumer‐grade pulse oximeters are accurate for home and medical use: Implications for use in the COVID‐19 pandemic and other resource‐limited environments\", JACP Open, 1 (2020). CrossRef K.E.J. Philip, B. Bennet, S. Fuller, et al., \"Working accuracy of pulse oximetry in COVID-19 patients stepping down from intensive care: a clinical evaluation \", BMJ Open Resp. Res. 7 (2020). CrossRef S. Seifi, A. Khatony, G. Moradi, A. Abdi, and F. Najafi, \"Accuracy of pulse oximetry in detection of oxygen saturation in patients admitted to the intensive care unit of heart surgery: comparison of finger, toe, forehead and earlobe probes\", BMC Nursing 17, 15 (2018). CrossRef A. Cysewska-Sobusiak, \"A modern approach to the determination of expanded uncertainty in noninvasive blood oximetry\", Measurement 25 (1999). CrossRef A. Cysewska-Sobusiak, \"The importance of the combined teaching and research work in the education of biomedical engineering\", Biocybernetics and Biomedical Engineering 22, 4 (2002). CrossRef A. Cysewska-Sobusiak, \"Noninvasive optoelectronic monitoring of the living tissues vitality\", 3rd Int. Workshop on Robot Motion and Control, Nov. 2002 (2002). CrossRef A. Cysewska-Sobusiak, \"Examples of acquisition and application of biooptical signals\", Phot. Lett. Poland 11, 2 (2019). CrossRef","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":"13 1","pages":"19-21"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46120088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Giant cross-Kerr nonlinearity in a four-level Y-type atomic system","authors":"N. Phu, N. H. Bang, Doai Van Le","doi":"10.4302/PLP.V13I1.1081","DOIUrl":"https://doi.org/10.4302/PLP.V13I1.1081","url":null,"abstract":"The analytical expression for the group index in a degenerated three-level lambda-type atomic system is derived as a function of the parameters of laser fields and external magnetic field. The influence of the external magnetic field on the group index is investigated. It is shown that by changing the magnitude or sign of the external magnetic field, the transparency window with normal dispersion switches to enhanced absorption with anomalous dispersion at the line center and hence the light propagation can be converted between subluminal and superluminal modes. Full Text: PDF ReferencesR. W. Boyd, \"Slow and fast light: fundamentals and applications\", J. Mod. Opt. 56 (2009) 1908-1915 CrossRef K.J. Boller, A. Imamoglu, S.E. Harris, \"Observation of electromagnetically induced transparency\", Phys. Rev. Lett. 66 (1991) 2593. CrossRef A. Lezama, S. Barreiro, and A. M. Akulshin, \"Electromagnetically induced absorption\", Phys. Rev. A 59 (1999) 4732-4735. CrossRef L. V. Hau, S. E. Harris, Z. Dutton, C. H. Bejroozi, \"Light speed reduction to 17 metres per second in an ultracold atomic gas\", Nature 397, 594 (1999) CrossRef L. J. Wang, A. Kuzmich, and A. Dogariu, \"Gain-assisted superluminal light propagation\", Nature 406 (6793), 277-279 (2000) CrossRef A. V. Turukhin, V. S. Sudarshanam, M. S. Shahriar, J. A. Musser, B. S. Ham, P. R. Hammer, \"Observation of Ultraslow and Stored Light Pulses in a Solid\", Phys. Rev. Lett. 88, 023602 (2002). CrossRef K. Bencheikh, E. Baldit, S. Briaudeau, P. Monnier, J. A. Levenson, and G. Mélin, \"Slow light propagation in a ring erbium-doped fiber\", Opt. Express 18 (25), 25642-25648 (2010). CrossRef E. E. Mikhailov, V. A. Sautenkov, I. Novikova, G. R. Welch, \"Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas\", Phys. Rev. A 69, 063808 (2004). CrossRef E. E. Mikhailov, V. A. Sautenkov, Y. V. Rostovtsev, G.R. Welch, \"Absorption resonance and large negative delay in rubidium vapor with a buffer gas\", J. Opt. Soc. Am. B 21, 425 (2004). CrossRef A. M Akulshin and R. J McLean, \"Fast light in atomic media\", J. Opt. 12 (2010) 104001. CrossRef Vineet Bharti, Vasant Natarajan, \"Sub- and super-luminal light propagation using a Rydberg state\", Opt. Comm. 392 (2017) 180-184. CrossRef N.T. Anh, L.V. Doai, D.H. Son, and N.H. Bang, \"Manipulating multi-frequency light in a five-level cascade EIT medium under Doppler broadening\", Optik 171 (2018) 721-727. CrossRef N.T. Anh, L.V. Doai, and N.H. Bang, \"Manipulating multi-frequency light in a five-level cascade-type atomic medium associated with giant self-Kerr nonlinearity\", J. Opt. Soc. Am. B 35 (2018) 1233. CrossRef N.H. Bang, L.N.M. Anh, N.T. Dung and L.V. Doai, \"Comparative Study of Light Manipulation in Three-Level Systems Via Spontaneously Generated Coherence and Relative Phase of Laser Fields*\", Commun. Theor. Phys. 71 (2019) 947-954. CrossRef L.V. Doai, \"The effect of giant Kerr nonlinearity on group velocity in a six-level inverted-Y","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":"31 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71094831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parametric resonance of acoustic and optical phonons in GaAs/GaAsAl quantum well in the presence of laser field","authors":"D. Nguyen, L. C. Trung, Pham Thi Hoai Duong, T. C. Phong","doi":"10.4302/PLP.V13I1.1051","DOIUrl":"https://doi.org/10.4302/PLP.V13I1.1051","url":null,"abstract":"","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":"13 1","pages":"7"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42303687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The linearization of the relationship between scene luminance and digital camera output levels","authors":"E. Czech, D. Czyżewski","doi":"10.4302/PLP.V13I1.1086","DOIUrl":"https://doi.org/10.4302/PLP.V13I1.1086","url":null,"abstract":"","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":"13 1","pages":"16"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47594179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measuring the refractive index of a methanol - water mixture according to the wavelength","authors":"D. T. Nguyen, L. C. Trung, N. D. Cuong, Ho Dinh Quang, D. X. Khoa, N. Phu, C. V. Lanh, Nguyen Thanh Vinh, D. T. Thuy, B. D. Thuan","doi":"10.4302/PLP.V13I1.1058","DOIUrl":"https://doi.org/10.4302/PLP.V13I1.1058","url":null,"abstract":"The refractive index of a methanol-water mixture depending on the wavelength at different concentrations was determined by our experimental method using a Michelson interferometer system. A comparative study of Gladstone-Dale, Arago–Biot and Newton relations for predicting the refractive index of a liquid has been carried out to test their validity for the methanol-water mixture with different concentrations: 30%, 40%, 50%, 60%, 80%, and 100%. The comparison shows a good agreement between our experimental results and the results in the expressions studied over a wavelength range approximately from 450 to 850 nm. Accurate knowledge of the refractive index of a mixture has great relevance in theoretical and applied areas of research. In many instances, refractive index data for liquids cannot be found in reference papers and must be measured as needed [1÷5]. Therefore, a costeffective method that also provides high accuracy would apply in practice. Measurements of the refractive index of liquid mixtures are essential to determine the composition of binary mixtures, usually for non-ideal mixtures in which direct experimental measurements are made. Most empirical methods for calculating redundant properties are an attempt to explain non-ideality of intermolecular interactions. Finding a small difference in the refractive index of a mixture is often more important than the absolute value of the index itself and these differences cannot be accurately measured by traditional methods [6]. There are several techniques for determining the refractive index of liquids. Among them, we often determine the minimum deviation angle of a light ray passing through the liquid contained in a triangular cell, which is often used [7]. This method has been found to be a relatively simple way of obtaining the refractive index of liquid mixtures where high accuracy is not required. In the present paper a modified Michelson interferometer is described, which has been employed for measuring the refractive indices of liquids [8÷11]. The aim of this paper is to extend the use of a Michelson interferometer system for measuring directly refractive index of the methanol – water mixture of known thickness. We present a wide spectral interferometric technique employing a lowresolution spectrometer for dispersion measurement of t the group refractive indices of liquids over the * E-mail: thuanbd@vinhuni.edu.vn wavelength range approximately from 450 to 850 nm. In the next step we compare the measured results with theoretical models, as known in the works [12÷14]. The refractive index of a binary mixture is defined by one of the equations: the Gladstone-Dale relation is used for optical analysis of a liquid, for use in fluid dynamics. The relation has also been used to calculate the refractive index. The Gladstone-Dale (G-D) equation for predicting the refractive index of a binary liquid mixture is as follows [12]: ( ) ( ) ( ) 1 1 2 2 1 1 1 . n n n  − = −  + −  (1) Arago-Biot (A-","PeriodicalId":20055,"journal":{"name":"Photonics Letters of Poland","volume":"13 1","pages":"10"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47606979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}