Pub Date : 2024-07-11DOI: 10.1088/2040-8986/ad61fb
V. Astapenko
The absorption of short laser pulses in an optically dense medium is theoretically studied based on the total absorption coefficient over the entire duration of the pulse, taking into account the effects of propagation and reflection of pulse from vacuum/medium interface. The approach is the generalization of our previous work [1], which traced a “bridge” between the micro- and macro-description of radiation processes in a medium induced by electromagnetic pulses of arbitrary duration. The expression for the total absorption coefficient is obtained in terms the complex refractive index of the medium. Various limits of this expression are considered. Numerical calculations of the dependence of the total absorption coefficient on the parameters of the laser pulses and the thickness of the medium layer were carried out and the results obtained were discussed.
{"title":"Absorption of ultrashort laser pulses in medium with account for propagation effects","authors":"V. Astapenko","doi":"10.1088/2040-8986/ad61fb","DOIUrl":"https://doi.org/10.1088/2040-8986/ad61fb","url":null,"abstract":"\u0000 The absorption of short laser pulses in an optically dense medium is theoretically studied based on the total absorption coefficient over the entire duration of the pulse, taking into account the effects of propagation and reflection of pulse from vacuum/medium interface. The approach is the generalization of our previous work [1], which traced a “bridge” between the micro- and macro-description of radiation processes in a medium induced by electromagnetic pulses of arbitrary duration. The expression for the total absorption coefficient is obtained in terms the complex refractive index of the medium. Various limits of this expression are considered. Numerical calculations of the dependence of the total absorption coefficient on the parameters of the laser pulses and the thickness of the medium layer were carried out and the results obtained were discussed.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"78 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657715","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":"Efficient THz generation through laser and plasma parameter optimization with Sinh-Gaussian beams in magnetized plasma","authors":"Jasveer Singh, Sunita Rani, Hitesh Kumar Midha, Vivekanand Sharma, V. Thakur","doi":"10.1007/s12596-024-02031-5","DOIUrl":"https://doi.org/10.1007/s12596-024-02031-5","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"121 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656885","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":"Radial diversification of pump and signal intensities in EDFA comprising LP01 mode dispersion compensation fibers in third order nonlinear condition","authors":"Bappa Ditya Biswas, Ramkrishna Rakshit, Angshuman Majumdar","doi":"10.1007/s12596-024-01972-1","DOIUrl":"https://doi.org/10.1007/s12596-024-01972-1","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"21 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660786","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}
Pub Date : 2024-07-10DOI: 10.1088/2040-8986/ad6169
Sicheng Xu, Siyao Yu, Liming Qian, Gaige Zheng
Strong circular dichroism (CD) has been observed in Weyl semimetals (WSMs) because of the extremely large gyrotropic optical response. However, traditional proposals cannot tune the wavelength of CD peaks continuously without changing the geometric parameters or external magnetic field, which limits the practical application. This study presents a lithography-free platform exhibits near-unity CD in a WSM-graphene-dielectric structure. It is theoretically shown that the proposal possesses different reflectance properties for right-hand circular polarization (RCP) and left-hand circular polarization (LCP) light in the mid-infrared (mid-IR) range. The merits of the wide-angular chiral capacity of CP waves can also be maintained. The CD of the chiral structure can be tuned not only by adjusting the structural parameters, but also the chemical potential of graphene, which may also facilitate the design of more efficient chiral optical devices.
由于韦尔半金属（WSMs）具有极强的回旋光学响应，因此人们在其中观察到了强烈的圆二色性（CD）。然而，传统方案无法在不改变几何参数或外部磁场的情况下连续调节 CD 峰的波长，这限制了其实际应用。本研究提出了一种免光刻平台，在 WSM 石墨烯介电结构中显示出近乎统一的 CD。理论证明，该方案在中红外（mid-IR）范围内对右旋圆偏振光（RCP）和左旋圆偏振光（LCP）具有不同的反射特性。CP 波的宽角手性容量的优点也得以保持。手性结构的 CD 不仅可以通过调整结构参数来调节，还可以通过调整石墨烯的化学势来调节，这也有助于设计更高效的手性光学器件。
{"title":"Tunable and strong circular dichroism mediated with graphene-Weyl semimetal planar scheme","authors":"Sicheng Xu, Siyao Yu, Liming Qian, Gaige Zheng","doi":"10.1088/2040-8986/ad6169","DOIUrl":"https://doi.org/10.1088/2040-8986/ad6169","url":null,"abstract":"\u0000 Strong circular dichroism (CD) has been observed in Weyl semimetals (WSMs) because of the extremely large gyrotropic optical response. However, traditional proposals cannot tune the wavelength of CD peaks continuously without changing the geometric parameters or external magnetic field, which limits the practical application. This study presents a lithography-free platform exhibits near-unity CD in a WSM-graphene-dielectric structure. It is theoretically shown that the proposal possesses different reflectance properties for right-hand circular polarization (RCP) and left-hand circular polarization (LCP) light in the mid-infrared (mid-IR) range. The merits of the wide-angular chiral capacity of CP waves can also be maintained. The CD of the chiral structure can be tuned not only by adjusting the structural parameters, but also the chemical potential of graphene, which may also facilitate the design of more efficient chiral optical devices.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"52 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660059","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}
Pub Date : 2024-07-10DOI: 10.1007/s12596-024-01980-1
Anirudh Banerjee
{"title":"CoViD-19 disinfectant tester by using a defect layered 1D quaternary photonic band gap structure","authors":"Anirudh Banerjee","doi":"10.1007/s12596-024-01980-1","DOIUrl":"https://doi.org/10.1007/s12596-024-01980-1","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"26 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141662158","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}
Pub Date : 2024-07-10DOI: 10.1007/s12596-024-01995-8
Maryam A. Hussein, Kadhim A. Aadim
{"title":"Spectroscopic analysis of iron plasma produced by influence of argon gas flow rate on plasma parameter","authors":"Maryam A. Hussein, Kadhim A. Aadim","doi":"10.1007/s12596-024-01995-8","DOIUrl":"https://doi.org/10.1007/s12596-024-01995-8","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"27 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141662540","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}
Pub Date : 2024-07-10DOI: 10.1007/s12596-024-02009-3
Naveen Gupta, Rohit Johari, A. K. Alex
{"title":"Excitation of electron plasma wave by optically guided $${varvec{q}}$$-gaussian laser beam in plasma channel created by ignitor heater technique","authors":"Naveen Gupta, Rohit Johari, A. K. Alex","doi":"10.1007/s12596-024-02009-3","DOIUrl":"https://doi.org/10.1007/s12596-024-02009-3","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"78 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141662644","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}
Pub Date : 2024-07-09DOI: 10.1088/2040-8986/ad60db
Hongbin Nie, Hao Xiong, Zheqiang Zhong, Bin Zhang
The propagation of intense laser beams in plasma inevitably gives rise to laser plasma instabilities, which have a significant impact on the illumination uniformity of the focused spot on the target in inertial confinement fusion (ICF) facilities. Here we propose an ultrafast smoothing scheme using a rotating beam (RB) to mitigate the laser plasma filamentation. Using the propagation model of the rotating beam in plasma for the laser-plasma self-focusing (SF) and filamentation, the filamentation characteristics of laser spots were analyzed. The results indicate that the rotating beam smoothing scheme, operating at picosecond timescale, exhibits superior mitigation effect of laser plasma filamentation.
{"title":"Mitigation of laser plasma filamentation by rotating beam smoothing scheme","authors":"Hongbin Nie, Hao Xiong, Zheqiang Zhong, Bin Zhang","doi":"10.1088/2040-8986/ad60db","DOIUrl":"https://doi.org/10.1088/2040-8986/ad60db","url":null,"abstract":"\u0000 The propagation of intense laser beams in plasma inevitably gives rise to laser plasma instabilities, which have a significant impact on the illumination uniformity of the focused spot on the target in inertial confinement fusion (ICF) facilities. Here we propose an ultrafast smoothing scheme using a rotating beam (RB) to mitigate the laser plasma filamentation. Using the propagation model of the rotating beam in plasma for the laser-plasma self-focusing (SF) and filamentation, the filamentation characteristics of laser spots were analyzed. The results indicate that the rotating beam smoothing scheme, operating at picosecond timescale, exhibits superior mitigation effect of laser plasma filamentation.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"124 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665243","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}
Pub Date : 2024-07-09DOI: 10.1007/s12596-024-02017-3
Chandrika Barman, Darshana Bora, Nitu Borgohain
{"title":"Optimization of slow light under EIT in semiconductor multiple quantum wells","authors":"Chandrika Barman, Darshana Bora, Nitu Borgohain","doi":"10.1007/s12596-024-02017-3","DOIUrl":"https://doi.org/10.1007/s12596-024-02017-3","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"66 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141663352","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}
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