Pub Date : 2026-02-02DOI: 10.1007/s10043-025-01027-1
P. Vayunandana Kishore, N. Rajeswara Rao, B. M. Pratima, D. Vijaya Lakshmi, A. Suneel Kumar, Muthaiyan Xavier Suresh
{"title":"Detection of fluoride ion using U-bent optical fiber functionalized with curcumin-tagged gold nanoparticles","authors":"P. Vayunandana Kishore, N. Rajeswara Rao, B. M. Pratima, D. Vijaya Lakshmi, A. Suneel Kumar, Muthaiyan Xavier Suresh","doi":"10.1007/s10043-025-01027-1","DOIUrl":"https://doi.org/10.1007/s10043-025-01027-1","url":null,"abstract":"","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"56 6 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146101390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Design of a novel, alignment-free, ultra-thin multi-layered diffuser film for mini-LED backlight unit and other LED general lighting applications is presented. The ultra-thin diffuser film is inserted between the blue mini-LED array and the QD film for the backlight application. The diffuser film consists of two optical elements, a diffractive layer (DOE or a microprism-array) faced on the mini-LED side and a dielectric multi-layer stack faced on the QD film side. The diffractive layer optimally adjusts the incident angle of the lights emitted out of the mini-LED and the dielectric multi-layer stack acts as an angle-selective filter. The innovative combination of the two optical elements realizes distinct improvement of lighting efficiency and illuminance uniformity without alignment of the diffuser film with the mini-LED array. We also demonstrate the optimal design of the diffuser film using Pareto solution analysis. This method is flexibly applicable to optimally designing not only mini-LED backlight units but also various general lighting applications.
{"title":"Design and Pareto solution analysis of novel alignment-free ultra-thin multi-layered diffuser film applied for mini-LED backlighting and general lighting applications","authors":"Marii Nishikawa, Yukio Taniguchi, Masahiro Goto, Yasuyuki Ohyagi, Yoshihiro Kanai, Masayuki Sekido, Hirotsugu Yamamoto","doi":"10.1007/s10043-025-01026-2","DOIUrl":"https://doi.org/10.1007/s10043-025-01026-2","url":null,"abstract":"Design of a novel, alignment-free, ultra-thin multi-layered diffuser film for mini-LED backlight unit and other LED general lighting applications is presented. The ultra-thin diffuser film is inserted between the blue mini-LED array and the QD film for the backlight application. The diffuser film consists of two optical elements, a diffractive layer (DOE or a microprism-array) faced on the mini-LED side and a dielectric multi-layer stack faced on the QD film side. The diffractive layer optimally adjusts the incident angle of the lights emitted out of the mini-LED and the dielectric multi-layer stack acts as an angle-selective filter. The innovative combination of the two optical elements realizes distinct improvement of lighting efficiency and illuminance uniformity without alignment of the diffuser film with the mini-LED array. We also demonstrate the optimal design of the diffuser film using Pareto solution analysis. This method is flexibly applicable to optimally designing not only mini-LED backlight units but also various general lighting applications.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"31 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146005630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-19DOI: 10.1007/s10043-025-01028-0
Wei-Qin Li, Bo Zhao, Yin Liu
{"title":"Planck-consistent emissivity inversion from band-limited IR thermography by adaptive escaping grey wolf optimization","authors":"Wei-Qin Li, Bo Zhao, Yin Liu","doi":"10.1007/s10043-025-01028-0","DOIUrl":"https://doi.org/10.1007/s10043-025-01028-0","url":null,"abstract":"","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"96 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146005861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-17DOI: 10.1007/s10043-025-01023-5
Joseph P. Lazzaro, Xiaoxin Wang, Charles J. Carver, Nicholas Shade, Hadleigh Schwartz, Yanchen Liu, Xia Zhou, Jifeng Liu, Eric R. Fossum
{"title":"Multi-Gbps visible light communication with high-efficiency, low-speckle contrast white laser light","authors":"Joseph P. Lazzaro, Xiaoxin Wang, Charles J. Carver, Nicholas Shade, Hadleigh Schwartz, Yanchen Liu, Xia Zhou, Jifeng Liu, Eric R. Fossum","doi":"10.1007/s10043-025-01023-5","DOIUrl":"https://doi.org/10.1007/s10043-025-01023-5","url":null,"abstract":"","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"101 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146005625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The photodetection properties and the equivalent circuit of organic photodetectors (OPDs) based on zinc phthalocyanine (ZnPc) and fullerene derivative (C 60 ) solar cells are discussed. The CuI layer is very effective to enhance the responsivity and the bandwidth of the OPDs. The obtained responsivity is 29 mA/W, and the bandwidth is 300 kHz, which is restricted by the modulation bandwidth of the illuminating laser. The complex impedance of the OPD is measured, and two types of equivalent circuit are discussed. The simple equivalent circuit is composed of a series resistance and a parallel circuit of a resistance and a capacitance, and it approximately describes the measured complex impedance. The precise equivalent circuit is composed of a series resistance and two parallel circuits of resistance and capacitance, describing the ZnPc and the C 60 separately, and it describes the measured complex impedance very well. The frequency response is simulated by using the equivalent circuits, and the simulated bandwidth is almost the same as the measured bandwidth.
{"title":"Frequency response and equivalent circuit of organic photodetectors based on zinc phthalocyanine and the fullerene derivative organic solar cell","authors":"Xingjian Xu, Jiaxun You, Md. Shahiduzzaman, Tetsuya Taima, Koichi Iiyama","doi":"10.1007/s10043-025-01016-4","DOIUrl":"https://doi.org/10.1007/s10043-025-01016-4","url":null,"abstract":"The photodetection properties and the equivalent circuit of organic photodetectors (OPDs) based on zinc phthalocyanine (ZnPc) and fullerene derivative (C <jats:sub>60</jats:sub> ) solar cells are discussed. The CuI layer is very effective to enhance the responsivity and the bandwidth of the OPDs. The obtained responsivity is 29 mA/W, and the bandwidth is 300 kHz, which is restricted by the modulation bandwidth of the illuminating laser. The complex impedance of the OPD is measured, and two types of equivalent circuit are discussed. The simple equivalent circuit is composed of a series resistance and a parallel circuit of a resistance and a capacitance, and it approximately describes the measured complex impedance. The precise equivalent circuit is composed of a series resistance and two parallel circuits of resistance and capacitance, describing the ZnPc and the C <jats:sub>60</jats:sub> separately, and it describes the measured complex impedance very well. The frequency response is simulated by using the equivalent circuits, and the simulated bandwidth is almost the same as the measured bandwidth.","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"10 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145771133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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