Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598058
H. Morisawa, A. Ono, W. Inami, Y. Kawata
Hot-electrons have been attracting attention for applications in photodetectors and photocatalysts due to their high energy. We report the hot-electron emission enhancement by an aluminum disk-hole array structure. The coupling effect by the structure further enhances the electric field enhancement effect, which improves efficiency electron emission.
{"title":"Disk-hole array structure for hot-electron emission enhancement","authors":"H. Morisawa, A. Ono, W. Inami, Y. Kawata","doi":"10.23919/MOC52031.2021.9598058","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598058","url":null,"abstract":"Hot-electrons have been attracting attention for applications in photodetectors and photocatalysts due to their high energy. We report the hot-electron emission enhancement by an aluminum disk-hole array structure. The coupling effect by the structure further enhances the electric field enhancement effect, which improves efficiency electron emission.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124561131","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598056
S. Kawahito
This paper describes recent progress of multi-tap time-resolved CMOS image sensors and their applications. Using multiple signal taps in each pixel and designing it for high-speed photo carrier response, various CMOS-based highly-time-resolved imaging systems with advanced performance and functions have been developed. Applications include time-of-flight range imaging and biomedical, imaging such as time-resolved near infrared spectroscopy, fluorescence lifetime imaging, simultaneous multiple-focus microscopy and contact-less heart-rate variability measurements.
{"title":"Multi-Tap Time-Resolved CMOS Image Sensors and Their Applications","authors":"S. Kawahito","doi":"10.23919/MOC52031.2021.9598056","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598056","url":null,"abstract":"This paper describes recent progress of multi-tap time-resolved CMOS image sensors and their applications. Using multiple signal taps in each pixel and designing it for high-speed photo carrier response, various CMOS-based highly-time-resolved imaging systems with advanced performance and functions have been developed. Applications include time-of-flight range imaging and biomedical, imaging such as time-resolved near infrared spectroscopy, fluorescence lifetime imaging, simultaneous multiple-focus microscopy and contact-less heart-rate variability measurements.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126948867","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}
We show the design, fabrication, and characterization of transverse electric mode semiconductor optical isolators with Co. The device lengths are shorter than those of typical laser diodes. Transmitted light intensity altered with clear polarization dependence, which can be applied in a wide range of applications in photonic integrated circuits.
{"title":"36.6 dB/mm Extinction Ratio in TE Mode Semiconductor Optical Isolators with Co","authors":"Reona Oshikiri, Yuka Kobayashi, Satoshi Nishiyama, Hromasa Shimizu","doi":"10.23919/MOC52031.2021.9598010","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598010","url":null,"abstract":"We show the design, fabrication, and characterization of transverse electric mode semiconductor optical isolators with Co. The device lengths are shorter than those of typical laser diodes. Transmitted light intensity altered with clear polarization dependence, which can be applied in a wide range of applications in photonic integrated circuits.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127990208","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598088
Hiroki Kojima, J. Fujikata, T. Kita
In this study, by loading a Si optical modulator with an integrated polarizer using a curved waveguide, we developed a Si optical modulator with a high extinction ratio of over 50 dB. It can be applied to a wide range of applications from digital coherent optical communication to sensing.
{"title":"High extinction ratio Si optical modulator loaded with integrated polarizer","authors":"Hiroki Kojima, J. Fujikata, T. Kita","doi":"10.23919/MOC52031.2021.9598088","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598088","url":null,"abstract":"In this study, by loading a Si optical modulator with an integrated polarizer using a curved waveguide, we developed a Si optical modulator with a high extinction ratio of over 50 dB. It can be applied to a wide range of applications from digital coherent optical communication to sensing.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133744476","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598068
Shun Kobayashi, A. Nakamura, W. Inami, Y. Kawata
Thin films using ZnO and Al2O3 were fabricated by ALD. The crystallinity, surface roughness, spatial uniformity of the emission intensity and luminescence intensity were evaluated. As a result, the crystallinity, surface roughness, and spatial uniformity of the emission intensity improved as the Al2O3 layer was increased, but luminescence intensity decreased.
{"title":"Development of Luminescent Thin Films Based on Superlattice Structures of Al2O3 and ZnO by Atomic Layer Deposition","authors":"Shun Kobayashi, A. Nakamura, W. Inami, Y. Kawata","doi":"10.23919/MOC52031.2021.9598068","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598068","url":null,"abstract":"Thin films using ZnO and Al<inf>2</inf>O<inf>3</inf> were fabricated by ALD. The crystallinity, surface roughness, spatial uniformity of the emission intensity and luminescence intensity were evaluated. As a result, the crystallinity, surface roughness, and spatial uniformity of the emission intensity improved as the Al<inf>2</inf>O<inf>3</inf> layer was increased, but luminescence intensity decreased.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128344352","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598071
Ayana Mizuno, A. Ono
We experimentally demonstrated the plasmonic color modulation by dynamically controlling the interparticle distance of the crystalline Ag nanocube monolayer on the stretchable substrate. The transmitted light color modulated from magenta, orange to yellow by stretching of the substrate under random polarization incidence.
{"title":"Plasmonic color modulation of crystalline Ag nanocube monolayer by dynamic control of stretchable substrate","authors":"Ayana Mizuno, A. Ono","doi":"10.23919/MOC52031.2021.9598071","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598071","url":null,"abstract":"We experimentally demonstrated the plasmonic color modulation by dynamically controlling the interparticle distance of the crystalline Ag nanocube monolayer on the stretchable substrate. The transmitted light color modulated from magenta, orange to yellow by stretching of the substrate under random polarization incidence.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133396377","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598142
Yoshiki Kamiura, Taiga Kurisawa, C. Fujikawa, O. Mikami
A unique combination of microlens and pillar on the facet of single mode fiber is proposed and examined to achieve high coupling efficiency to small spot size of silicon photonics. Pillar and microlens are fabricated by Self-Written Waveguide (SWW) method and dipping method, respectively using UV-curable resin.
{"title":"A Unique Combination of Microlens and Pillar on Fiber Facet using UV-Curable Resin for High Optical Coupling to Silicon Photonics","authors":"Yoshiki Kamiura, Taiga Kurisawa, C. Fujikawa, O. Mikami","doi":"10.23919/MOC52031.2021.9598142","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598142","url":null,"abstract":"A unique combination of microlens and pillar on the facet of single mode fiber is proposed and examined to achieve high coupling efficiency to small spot size of silicon photonics. Pillar and microlens are fabricated by Self-Written Waveguide (SWW) method and dipping method, respectively using UV-curable resin.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132094404","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598154
S. Abe, H. Hara, S. Masuda, H. Yamada
We have developed a simple fabrication process of low-insertion-loss vertical-taper structures which can locally optimize the Si thickness of silicon-photonic devices. Fabricated vertical-taper structures realized the conversion of Si-waveguide thickness from 400 nm to 220 nm, whose insertion loss was measured to be less than 0.5 dB.
{"title":"Fabrication of Vertical-Taper Structures for Silicon Photonic Devices by Local-Thickness-Thinning Process","authors":"S. Abe, H. Hara, S. Masuda, H. Yamada","doi":"10.23919/MOC52031.2021.9598154","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598154","url":null,"abstract":"We have developed a simple fabrication process of low-insertion-loss vertical-taper structures which can locally optimize the Si thickness of silicon-photonic devices. Fabricated vertical-taper structures realized the conversion of Si-waveguide thickness from 400 nm to 220 nm, whose insertion loss was measured to be less than 0.5 dB.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124062537","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598161
F. Capasso
Metasurfaces have enabled the redesign of optics into thin and planar elements. The planarity of flat optics will lead to the unification of semiconductor manufacturing and lens making, where the planar technology to manufacture chips will be adapted to make CMOS compatible metasurface based optical components, impacting technology and science
{"title":"Flat Optics Based on Metasurfaces: From Components to Cameras","authors":"F. Capasso","doi":"10.23919/MOC52031.2021.9598161","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598161","url":null,"abstract":"Metasurfaces have enabled the redesign of optics into thin and planar elements. The planarity of flat optics will lead to the unification of semiconductor manufacturing and lens making, where the planar technology to manufacture chips will be adapted to make CMOS compatible metasurface based optical components, impacting technology and science","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121267095","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 : 2021-09-26DOI: 10.23919/MOC52031.2021.9598086
Rahul Panchal, A. Sinha
In the proposed work, we fabricated a liquid crystal cladding waveguide-based variable optical attenuator. The waveguide is realized using a negative photoresist (AZ15nXT) core on indium tin oxide (ITO) coated glass substrates. The device is characterized at two wavelengths, 633 nm and 520 nm. The transverse magnetic (TM) modes get attenuated on the application of the electric field across the waveguide. The maximum extinction ratio achieved is 6.85 dB.
{"title":"Liquid Crystal Clad Polymer Waveguide based Electro-Optic Attenuator","authors":"Rahul Panchal, A. Sinha","doi":"10.23919/MOC52031.2021.9598086","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598086","url":null,"abstract":"In the proposed work, we fabricated a liquid crystal cladding waveguide-based variable optical attenuator. The waveguide is realized using a negative photoresist (AZ15nXT) core on indium tin oxide (ITO) coated glass substrates. The device is characterized at two wavelengths, 633 nm and 520 nm. The transverse magnetic (TM) modes get attenuated on the application of the electric field across the waveguide. The maximum extinction ratio achieved is 6.85 dB.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121285609","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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