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Asian journal of physics : an international quarterly research journal最新文献

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Higher order photonic stop-bands and random lasing in microflower decorated polystyrene opals 微花装饰聚苯乙烯蛋白石中的高阶光子阻带和随机激光
Asian journal of physics : an international quarterly research journal Pub Date : 2021-06-30 DOI: 10.54955/ajp.30.6.2021.863-870
N. Ojha, A. Sarkar, B. Bhaktha
{"title":"Higher order photonic stop-bands and random lasing in microflower decorated polystyrene opals","authors":"N. Ojha, A. Sarkar, B. Bhaktha","doi":"10.54955/ajp.30.6.2021.863-870","DOIUrl":"https://doi.org/10.54955/ajp.30.6.2021.863-870","url":null,"abstract":"Mono-sized polystyrene nanoparticles of different diameters were synthesized using emulsion polymerization process. Consequently, highly ordered 3-D photonic crystals (opals) of polystyrene nanoparticles were fabricated by evaporation assisted sedimentation deposition technique. The opal structures were found to exhibit very intense higher order photonic stop-bands (PSBs) along with the fundamental PSB. Numerically computed band diagram of polystyrene opal endorses the higher order energy bands in the experimental reflection spectra and the existence of Van Hove singularity. Also, on coating the opal structure with a 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) doped polyvinyl alcohol (PVA) thin film (DCM-PVA) active layer, random lasing (RL) was observed. © Anita Publications. All rights reserved.","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82835809","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}
引用次数: 0
Transverse optical current in off-axis vortex beams 离轴涡旋光束中的横向光电流
Asian journal of physics : an international quarterly research journal Pub Date : 2021-06-30 DOI: 10.54955/ajp.30.6.2021.899-906
Satyajit Maji, M. Brundavanam
{"title":"Transverse optical current in off-axis vortex beams","authors":"Satyajit Maji, M. Brundavanam","doi":"10.54955/ajp.30.6.2021.899-906","DOIUrl":"https://doi.org/10.54955/ajp.30.6.2021.899-906","url":null,"abstract":"Optical beams nesting single or more off-axial distribution of point vortices is considered. The effective topological charge carried out by the beam is explored when the beam is nesting a fractional order vortex phase, beam containing an arbitrary distribution of point vortices as well as when two or more integer order vortex fields are superposed. The orbital angular momentum (OAM) carried out by this beam is generally a fractional number when average OAM per photon is considered. Depending on the distribution of the point vortices the beam may carry a net transverse linear momentum which dictates the nature of the OAM carried out by the beams. When more than one off-axis vortex is present within the beam, the transverse Poynting vector also exhibits saddle points which reveal intricate topological structure of such optical vortex beams. © Anita Publications. All rights reserved.","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88043552","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}
引用次数: 0
Multi-photon absorption properties of semiconducting nanomaterials 半导体纳米材料的多光子吸收特性
Asian journal of physics : an international quarterly research journal Pub Date : 2021-06-30 DOI: 10.54955/AJP.30.6.2021.907-916
V. Nalla
{"title":"Multi-photon absorption properties of semiconducting nanomaterials","authors":"V. Nalla","doi":"10.54955/AJP.30.6.2021.907-916","DOIUrl":"https://doi.org/10.54955/AJP.30.6.2021.907-916","url":null,"abstract":"Multiphoton absorption (MPA) is a nonlinear optical process that involves simultaneous absorption of two or more photons by a material to promote its ground state to an excited state. Multiphoton absorption promises many important applications such as multi-dimensional fluorescence imaging, three dimensional (3D) data storage. Physical and chemical properties of nanometer sized semiconductor materials change drastically due to quantum size effect. Combination of both multiphoton absorption and quantum effects will be an interesting study. Multiphoton absorption of semiconducting nanomaterials is an exciting phenomenon which promotes many important applications. This paper reviews multi-photon absorption properties of different kinds of semiconducting nanomaterials starting from chalcogenide-based nanomaterials to perovskites nanomaterials and their applications in various fields. © Anita Publications. All rights reserved.","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85081074","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}
引用次数: 0
Coherent plasmonic absorption in the femtosecond regime 飞秒体制中的相干等离子体吸收
Asian journal of physics : an international quarterly research journal Pub Date : 2021-04-05 DOI: 10.54955/AJP.30.6.2021.889-898
V. Nalla, X. Fang, J. Valente, Handong Sun, N. Zheludev
{"title":"Coherent plasmonic absorption in the femtosecond regime","authors":"V. Nalla, X. Fang, J. Valente, Handong Sun, N. Zheludev","doi":"10.54955/AJP.30.6.2021.889-898","DOIUrl":"https://doi.org/10.54955/AJP.30.6.2021.889-898","url":null,"abstract":"Dissipation of electromagnetic energy through absorption is a fundamental process that underpins phenomena ranging from photovoltaics to photography, analytical spectroscopy, photosynthesis, and human vision. Absorption is also a dynamic process that depends on the duration of the optical illumination. Here, we report on the resonant plasmonic absorption of a nanostructured metamaterial and the non-resonant absorption of an unstructured gold film at different optical pulse durations. By examining the absorption in travelling and standing waves, we observe a plasmonic relaxation time of 11 fs as the characteristic transition time. The metamaterial acts as a beam-splitter with low absorption for shorter pulses, while as a good absorber for longer pulses. The transient nature of the absorption puts a frequency limit of ~90 THz on the bandwidth of coherently-controlled, all-optical switching devices, which is still a thousand times faster than other leading switching technologies. © Anita Publications. All rights reserved.","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"154 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88039683","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}
引用次数: 0
DFT Study on tautomerism of cytosine and its 5-haloderivatives: A Review* 胞嘧啶及其5-卤代衍生物互变异构的DFT研究进展*
Asian journal of physics : an international quarterly research journal Pub Date : 2021-03-01 DOI: 10.54955/ajp.30.3.2021.521-536
M. Alcolea Palafox, W. Kiefer, Kaushal Rani, B. Lal, J. K. Vats, Sudheer Kumar Singh, V. Rastogi
{"title":"DFT Study on tautomerism of cytosine and its 5-haloderivatives: A Review*","authors":"M. Alcolea Palafox, W. Kiefer, Kaushal Rani, B. Lal, J. K. Vats, Sudheer Kumar Singh, V. Rastogi","doi":"10.54955/ajp.30.3.2021.521-536","DOIUrl":"https://doi.org/10.54955/ajp.30.3.2021.521-536","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78601418","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}
引用次数: 0
Resolving power of optical instruments: A Tutorial 光学仪器的分辨能力:教程
Asian journal of physics : an international quarterly research journal Pub Date : 2021-01-01 DOI: 10.54955/ajp.30.1.2021.31-43
Rajpal Singh Sirohi
{"title":"Resolving power of optical instruments: A Tutorial","authors":"Rajpal Singh Sirohi","doi":"10.54955/ajp.30.1.2021.31-43","DOIUrl":"https://doi.org/10.54955/ajp.30.1.2021.31-43","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85788034","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}
引用次数: 0
Multi-pass, multi-beam and multi-wavelength optical interferometries 多通、多光束、多波长光学干涉测量
Asian journal of physics : an international quarterly research journal Pub Date : 2019-12-01 DOI: 10.54955/ajp.28.10-12.2019.1091-1102
Rajpal Singh Sirohi
{"title":"Multi-pass, multi-beam and multi-wavelength optical interferometries","authors":"Rajpal Singh Sirohi","doi":"10.54955/ajp.28.10-12.2019.1091-1102","DOIUrl":"https://doi.org/10.54955/ajp.28.10-12.2019.1091-1102","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76702408","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}
引用次数: 0
Shades and Ref lections of Light 光的阴影和反射
Asian journal of physics : an international quarterly research journal Pub Date : 2019-05-01 DOI: 10.54955/ajp.28.5.2019.309-317
Rajpal Singh Sirohi
{"title":"Shades and Ref lections of Light","authors":"Rajpal Singh Sirohi","doi":"10.54955/ajp.28.5.2019.309-317","DOIUrl":"https://doi.org/10.54955/ajp.28.5.2019.309-317","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82841750","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}
引用次数: 0
On the algorithms in phase-shift interferometry
Asian journal of physics : an international quarterly research journal Pub Date : 2019-05-01 DOI: 10.54955/ajp.28.5.2019.275-283
Rajpal Singh Sirohi
{"title":"On the algorithms in phase-shift interferometry","authors":"Rajpal Singh Sirohi","doi":"10.54955/ajp.28.5.2019.275-283","DOIUrl":"https://doi.org/10.54955/ajp.28.5.2019.275-283","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87596497","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}
引用次数: 0
Molecular structure and vibrational spectra of 2-thiouracil: A comparison with uracil 2-硫脲嘧啶的分子结构和振动光谱:与尿嘧啶的比较
Asian journal of physics : an international quarterly research journal Pub Date : 2017-12-01 DOI: 10.54955/ajp.26.11-12.2017.365-373
Kaushal Rani, J. Prakash, Sudheer Kumar Singh, J. K. Vats, M. Palafox, V. Rastogi
{"title":"Molecular structure and vibrational spectra of 2-thiouracil: A comparison with uracil","authors":"Kaushal Rani, J. Prakash, Sudheer Kumar Singh, J. K. Vats, M. Palafox, V. Rastogi","doi":"10.54955/ajp.26.11-12.2017.365-373","DOIUrl":"https://doi.org/10.54955/ajp.26.11-12.2017.365-373","url":null,"abstract":"","PeriodicalId":90793,"journal":{"name":"Asian journal of physics : an international quarterly research journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74357891","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}
引用次数: 0
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