Optical and Quantum Electronics最新文献

{"title":"Design and optimization of a graphene-based broadband absorber for enhanced absorption in the visible and near-infrared spectrum","authors":"Valiolah Pourhossein Bagheri,&nbsp;Hamed Saghaei,&nbsp;Alireza Ghorbani","doi":"10.1007/s11082-025-08083-6","DOIUrl":"10.1007/s11082-025-08083-6","url":null,"abstract":"<div><p>This paper presents the design and optimization of a graphene-based broadband absorber aimed at enhancing light absorption across the visible to near-infrared spectrum. The proposed structure features a metal film array with annular and L-shaped grooves that intensify electromagnetic fields and amplify local surface plasmon resonance. This leads to improved interaction between light and the graphene layer. To achieve optimal performance, the design process involved the use of the particle swarm optimization algorithm. This powerful tool fine-tunes the geometric parameters, including the thickness, length, and width of the grooves, with precision and rigor. The optimized structure, comprising chromium as the metal film and Al₂O₃ and TiO₂ as groove fillers, achieved an average absorption rate of 85.79%, a significant improvement over the initial average absorption of 74.33%. This design not only demonstrates substantial potential for applications in photonics, sensing, and energy harvesting but also offers an effective solution for broadband absorbers with high efficiency. Moreover, the innovative integration of graphene with annular and L-shaped grooves to concentrate and amplify electromagnetic fields highlights a key advancement in absorber design.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning band gap and enhancing optoelectronic performance of Fr-based perovskite FrBF3 (B = Ge, Sn) under pressure","authors":"Adil Hossain,&nbsp;Muneef Hasan,&nbsp;Maruf Al Yeamin,&nbsp;Sheikh Joifullah,&nbsp;Mahfuzul Haque,&nbsp;Redi Kristian Pingak,&nbsp;Asif Hosen","doi":"10.1007/s11082-025-08089-0","DOIUrl":"10.1007/s11082-025-08089-0","url":null,"abstract":"<div><p>The commercial suitability of lead halide perovskites is deprived by stability and toxicity concerns despite their extraordinary physiochemical features and improved power conversion efficiency. There is an increasing preference towards reliable and ecologically sustainable alternatives with comparable optical and electronic characteristics. For this purpose, our study is concerned with identifying physical characteristics like structural, electronic, mechanical, and optical characteristics of FrBF₃ (B = Ge, Sn) under varying pressures up to 40 GPa. Both FrGeF₃ and FrSnF₃ have cubic crystal structures and their atomic bond length reduces with increasing pressure as lattice constant, and volume reduces with the application of hydrostatic pressure. They are structurally and mechanically stable in all the variations of pressure. Initially, both compounds have direct bandgap where FrGeF₃ has 2.14 eV bandgap and FrSnF₃ has 1.83 eV bandgap. The impact of pressure on band structure is notable as both compounds go through a linear transition from semiconductor to metal by concentrating electronic states at the Fermi level. The absorption, extinction coefficient, and optical conductivity also shift towards lower photon energy (redshift), which makes them viable options for solar cell development and optoelectronic devices under pressure as they can absorb photon energy of infrared and visible range. Besides, their mechanical features including elastic moduli, ductility, and anisotropy improve linearly with pressure. The findings of our study suggest that the perovskite FrBF₃ (B = Ge, Sn) exhibits an excellent improvement of mechanical, electronic, and optical characteristics when introduced to hydrostatic pressure, making them suitable for many real-life applications such as photodetector, sensor, energy storage devices, solar panels and other optoelectronic devices.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlling entanglement and steering in a damped qubit-photon-magnon system under external field influence","authors":"E. M. Khalil,&nbsp;Ahmed A. Zahia,&nbsp;M. Y. Abd-Rabbou","doi":"10.1007/s11082-025-08048-9","DOIUrl":"10.1007/s11082-025-08048-9","url":null,"abstract":"<div><p>This paper investigates the entanglement and quantum steering of an hybrid quantum system consisting of a pair of initially entangled atoms interacting inside a cavity in the presence of a magnon field and an external classical field. By solving the system using the master equation, the density operator of the total system is obtained. Using negativity and the Einstein-Podolsky-Rosen steering criterion, the time evolution of entanglement and steering between the two atoms as well as between the cavity field and the magnon are calculated. Our results show that the entanglement and steering between the atoms can be controlled by changing the coupling of the external classical field and the cavity-magnon system, where increasing them leads to the improvement of both steering and entanglement behaviors. On the contrary, increasing the cavity-magnon coupling weakens both the steering and entanglement between the fields, while adding the external classical field leads to increasing the field system’s randomness. We also observe that adding the surrounding environment destroys the entanglement and steering between both the atoms and the fields. Furthermore, bidirectional steering between the atoms contrasts with one-way steering of the fields, contingent upon system parameters.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soliton management for ultrashort pulse: dark and anti-dark solitons of Fokas–Lenells equation with a damping like perturbation and a gauge equivalent spin system","authors":"Riki Dutta,&nbsp;Gautam K. Saharia,&nbsp;Sagardeep Talukdar,&nbsp;Sudipta Nandy","doi":"10.1007/s11082-025-08038-x","DOIUrl":"10.1007/s11082-025-08038-x","url":null,"abstract":"<div><p>We investigate the propagation of an ultrashort optical pulse using Fokas-Lenells equation (FLE) under varying dispersion, nonlinear effects and perturbation. Such a system can be said to be under soliton management (SM) scheme. At first, under a gauge transformation, followed by shifting of variables, we transform FLE under SM into a simplified form, which is similar to an equation given by Davydova and Lashkin, we refer to this form as DLFLE. Then, we propose a bilinearization for DLFLE in a non-vanishing background by introducing an auxiliary function which transforms DLFLE into three bilinear equations. We solve these equations and obtain dark and anti-dark one-soliton solution (1SS) of DLFLE. From here, by reverse transformation of the solution, we obtain the 1SS of FLE and explore the soliton behavior under different SM schemes. Thereafter, we obtain dark and anti-dark two-soliton solution (2SS) of DLFLE and determine the shift in phase of the individual solitons on interaction through asymptotic analysis. We then, obtain the 2SS of FLE and represent the soliton graph for different SM schemes. Thereafter, we present the procedure to determine N-soliton solution (NSS) of DLFLE and FLE. The graphical representation of the soliton shows great potential of SM scheme to manipulate the pulse. Later, we introduce a Lax pair for DLFLE and through a gauge transformation we convert the spectral problem of our system into that of an equivalent spin system which is termed as Landau–Lifshitz (LL) system. LL equation (LLE) holds the potential to provide information about various nonlinear structures and properties of the system.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conceptual design of multimode interference-based photonic crystal Mach-Zehnder interferometer (de)interleavers","authors":"Masoud Kamran,&nbsp;Kambiz Abedi","doi":"10.1007/s11082-024-08021-y","DOIUrl":"10.1007/s11082-024-08021-y","url":null,"abstract":"<div><p>In this paper, we propose a novel and general approach for designing flat-top (de)multiplexers, particularly (de)interleavers, utilizing a Photonic Crystal Mach-Zehnder Interferometer (PC-MZI) based on multimode interference (MMI). We demonstrate the design and performance of 4-, 6-, 8-, and 16-channel PC-MZI (de)interleavers with minimal loss, low crosstalk, and a flat-top transmission spectrum achieved through a hexagonal photonic crystal structure. Simulation results at a central wavelength of 1.55 <i>µm</i> reveal 1 dB and 3 dB bandwidths of 3.3 <i>nm</i> and 7 <i>nm</i> for the 4-channel, 8.1 <i>nm</i> and 14 <i>nm</i> for the 6-channel, and 2.5 <i>nm</i> and 4.3 <i>nm</i> for the 16-channel (de)interleavers, respectively. Furthermore, the 16-channel device exhibits channel spacing of 11 <i>nm</i> between adjacent channels and 22 <i>nm</i> for non-adjacent channels separated by one intervening channel. Finally, we achieve power losses ranging from 0.05 dB to 3 dB and channel isolation between − 10 dB and − 22 dB.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of device design parameters on quantum efficiency of solar cell and revelation of recombination mechanism","authors":"L. M. Merlin Livingston,&nbsp;R. Thandaiah Prabu,&nbsp;R. Harikrishnan,&nbsp;Atul Kumar","doi":"10.1007/s11082-025-08074-7","DOIUrl":"10.1007/s11082-025-08074-7","url":null,"abstract":"<div><p>Quantum efficiency measures the carriers generated for incident photons, elucidating valuable insight into carrier collection process and recombination dynamics. In a theoretical model of a high-efficiency thin-film solar cell resembling a real-world device, we examined design parameters to assess their influence on external quantum efficiency (EQE) characteristics. Using 1D numerical simulation, the design parameters were varied separately at a time, to simulate EQE plots and to assign EQE feature with their generating causes. This analysis helps to diagnose certain imperfections in the device by observing spectral shape of EQE plots.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UVC LED system for prolonging the postharvest shelf life of murcotts","authors":"Thi-Thu-Ngoc Le,&nbsp;Chung-Ta Liao,&nbsp;Chi-Shou Wu,&nbsp;Tsung-Hsun Yang,&nbsp;Yeh-Wei Yu,&nbsp;Ching-Cherng Sun","doi":"10.1007/s11082-025-08071-w","DOIUrl":"10.1007/s11082-025-08071-w","url":null,"abstract":"<div><p>This study presents a simple optical system using ultraviolet C light-emitting diodes (UVC LEDs) to extend the postharvest shelf life of murcotts. The system featured a <span>(4 times 4)</span> array of UVC LEDs with dome lenses, targeting irradiation for a corresponding <span>(4 times 4)</span> array of murcotts. It achieves an irradiance distribution of 3 to 5 W/m² over the 34 × 34 cm target section, with uniformity of 85.4% in simulation and 77.2% in experiment, respectively. This system has the potential to integrate into automated controls, selectively switching off LEDs where murcotts are absent to save energy, ensuring others receive sufficient irradiance. In vitro results indicated that UVC dose over 0.3 kJ/m² inhibited conidial growth of <i>Penicillium digitatum,</i> the fungus that causes <i>green mold</i> in murcotts, by over 90% after 72 hours. In vivo results demonstrated UVC treatment effecitivelly mitigated the <i>green mold</i> disease on murcotts, with exposure times ranging from 3.0 to 15.0 min, corresponding to a UVC dose range of 0.9 to 4.5 kJ/m². This study aims to improve UVC technology in postharvest fruit preservation, advancing agricultural and food practices.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asymmetric optical cryptosystem with secret-key sharing based on coherent superposition and normalized decomposition","authors":"Mohamed G. Abdelfattah,&nbsp;Salem F. Hegazy,&nbsp;Salah S. A. Obayya","doi":"10.1007/s11082-025-08061-y","DOIUrl":"10.1007/s11082-025-08061-y","url":null,"abstract":"<div><p>In this paper, we present an asymmetric optical cryptosystem that performs multiple image encryption (MIE) featured with a secret image sharing (SIS) attribute, which holds significant potential for various security applications. The system is based on a novel normalized decomposition algorithm that breaks down the spectrum of each plain image into a set of <i>M</i> phase-only masks (POMs). Among these masks, one is unified and shared across all images, serving as the cipher image, while <span>((M-1))</span> masks are unique to each image and act as the corresponding secret key for that image. This approach enables the sharing of the <span>((M-1))</span> secret phase-only keys among authorized users, thereby enhancing the access security. To realize the MIE-SIS cryptosystem, a compact optical system is presented that employs Mach-Zehnder interferometer and spatial light modulators (SLMs) charged by POMs. The silhouette problem is completely resolved by applying a chaotic random amplitude mask (CRAM) to the image spectrum prior to the decomposition process. Numerical experiments verify the effective integrity of the MIE-SIS cryptosystem. Even a small deviation of 0.02 rad in any of the decomposed POMs results in a correlation coefficient value of less than 0.015, indicating high sensitivity to the phase keys. The results prove the unlimited encryption capacity of the MIE-SIS cryptosystem and demonstrate its robustness against Gaussian noise and statistical attacks.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural design of a mid-infrared low-noise waveguide photodetector integrated with an ultra-short waveguide taper","authors":"Yupeng Wang,&nbsp;Jindi Pei,&nbsp;Xuliang Chai,&nbsp;Lingfang Wang,&nbsp;Yi Zhou,&nbsp;Jianxin Chen","doi":"10.1007/s11082-025-08069-4","DOIUrl":"10.1007/s11082-025-08069-4","url":null,"abstract":"<div><p>Mid-infrared waveguide photodetectors, offering advantages such as high bandwidth, low power consumption, and ease of integration, are highly suitable for applications in spectral detection and molecular fingerprint recognition. To enhance the sensitivity and signal-to-noise ratio of waveguide photodetectors, this paper demonstrates the structural design of a mid-infrared waveguide photodetector integrated with an ultra-short waveguide taper. The proposed structure compresses the fiber-coupled optical field to subwavelength dimensions, effectively decreasing the area of the integrated absorber while maintaining quantum efficiency, thus achieving low dark current noise. The total length of the ultra-short waveguide taper has been reduced by an order of magnitude compared to the conventional waveguide taper. Simulation results indicate a one-order-of-magnitude reduction in dark current and a 68.2% reduction in noise equivalent power compared to the device without a waveguide taper. Our work presents a novel design approach for developing low-noise, highly integrated waveguide photodetectors.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of dielectric and optoelectronic properties in multifunctional PVDF/Ni-Mn ferrite nanocomposites","authors":"Sarah A. Alshehri,&nbsp;Ashraf A. Abul-Magd,&nbsp;F. S. El-Sbakhy,&nbsp;O. M. Hemeda,&nbsp;B. I. Salem","doi":"10.1007/s11082-024-08017-8","DOIUrl":"10.1007/s11082-024-08017-8","url":null,"abstract":"<div><p>Polymer-ferrite nanocomposite films were fabricated by incorporating annealed ferrite nanoparticles (Ni_0.2Mn_0.8Fe₂O₄) into polyvinylidene fluoride (PVDF) using a casting method. Infrared (IR) spectroscopy, UV–Vis spectrophotometry, broadband dielectric spectrometry (BDS), X-ray diffraction (XRD) and SEM micrograph characterized nanocomposite films. Structural analysis identified a mixture of PVDF in <span>(alpha)</span> and <span>(beta)</span> phases. With increasing ferrite concentration, the <span>(beta)</span>-phase became more dominant, while the <span>(alpha)</span>-phase became less prevalent. The average crystallite size of the films also grew from 20 to 27 nm with increasing ferrite content. Optical property analysis showed that the absorption coefficient <span>((alpha ))</span> increased with both the energy of the incident photon and ferrite content. Meanwhile, the optical indirect band gap narrowed from 5.59 to 4.90 eV with increasing ferrite content. In addition, the refractive index <span>((n))</span> increased with increasing ferrite concentration, ranging from 1.92 to 2.02. The dielectric properties were measured at room temperature and atmospheric pressure across an extensive frequency spectrum (10 Hz to 10 MHz), providing a comprehensive insight into the design and optimization of polymer-ferrite nanocomposite films for various applications.</p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"57 2","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}