Pub Date : 2012-10-04DOI: 10.1109/OMEMS.2012.6318781
D. Goldberg, Vinod M. Menon
We report enhanced amplified-spontaneous-emission from CdSe/ZnS quantum-dots in an all-dielectric Si3N4/SiO2 microcavity. Directional emission is observed through the cavity mode. Enhancement is confirmed with time-resolved and steady-state photoluminescence measurements showing a Purcell factor of ~1.3.
{"title":"Enhanced gain in colloidal quantum dots in all-dielectric microcavities","authors":"D. Goldberg, Vinod M. Menon","doi":"10.1109/OMEMS.2012.6318781","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318781","url":null,"abstract":"We report enhanced amplified-spontaneous-emission from CdSe/ZnS quantum-dots in an all-dielectric Si3N4/SiO2 microcavity. Directional emission is observed through the cavity mode. Enhancement is confirmed with time-resolved and steady-state photoluminescence measurements showing a Purcell factor of ~1.3.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132058887","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 report a photonic bandedge laser using subwavelength-scale pillars with a metal reflector plane bonded on the silicon substrate. Surface-emitting operation near the gamma point of the photonic band diagram is observed at 77 K.
{"title":"Nano pillar array laser with a bottom metal plane","authors":"Kyungmook Kwon, Jong-Bum You, Youngho Jung, Jaeho Shim, Kyoungsik Yu","doi":"10.1109/OMEMS.2012.6318887","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318887","url":null,"abstract":"We report a photonic bandedge laser using subwavelength-scale pillars with a metal reflector plane bonded on the silicon substrate. Surface-emitting operation near the gamma point of the photonic band diagram is observed at 77 K.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131146462","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318873
S. Choi, A. Higo, K. Kikuta, H. Toshiyoshi, Y. Nakano
We propose a simple and efficient off-chip coupler for vertical coupling between optical fibers and InP-based slab waveguides. Etching angle of the waveguide edge is controlled by an etching jig made of SiO2-coated aluminum for ICP-RIE. Simulation shows that maximum 71% coupling efficiency would be obtained by matrix expansion methods.
{"title":"A slanted InP waveguide for fiber coupler using skewed dry etching process","authors":"S. Choi, A. Higo, K. Kikuta, H. Toshiyoshi, Y. Nakano","doi":"10.1109/OMEMS.2012.6318873","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318873","url":null,"abstract":"We propose a simple and efficient off-chip coupler for vertical coupling between optical fibers and InP-based slab waveguides. Etching angle of the waveguide edge is controlled by an etching jig made of SiO2-coated aluminum for ICP-RIE. Simulation shows that maximum 71% coupling efficiency would be obtained by matrix expansion methods.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"65 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132476871","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318884
Jae-jun Kim, Youngseop Lee, Minhee Kang, K. Jeong
This work presents an effective method for the wide angle and high efficiency illumination with hierarchical structures on lens surfaces, which were fabricated by a photolithography and a capillary force lithography.
本文提出了一种利用光刻技术和毛细管力光刻技术在透镜表面制造具有层次结构的广角高效照明的有效方法。
{"title":"Hierarchically structured LED lens for wide angle and high efficiency illumination","authors":"Jae-jun Kim, Youngseop Lee, Minhee Kang, K. Jeong","doi":"10.1109/OMEMS.2012.6318884","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318884","url":null,"abstract":"This work presents an effective method for the wide angle and high efficiency illumination with hierarchical structures on lens surfaces, which were fabricated by a photolithography and a capillary force lithography.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134211926","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318875
Yue-Heng Li, Pei-chang Tsai, J. Lin, C. Hsu, Hung-Chih Kan
Annealed silver film on top of SiO2 nano-sphere opal shows a dip in the reflection spectrum at photonic band gap wavelengths. Fluorophores coated on the silver film shows over 70 time enhanced fluorescence.
{"title":"Silver nanocaps decorated photonic crystal for fluorescence enhancement","authors":"Yue-Heng Li, Pei-chang Tsai, J. Lin, C. Hsu, Hung-Chih Kan","doi":"10.1109/OMEMS.2012.6318875","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318875","url":null,"abstract":"Annealed silver film on top of SiO2 nano-sphere opal shows a dip in the reflection spectrum at photonic band gap wavelengths. Fluorophores coated on the silver film shows over 70 time enhanced fluorescence.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124243139","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318783
M. Khorasaninejad, M. Adachi, J. Walia, K. Karim, S. Saini
Silicon nanowires were grown on glass and steel substrates and investigated with Raman spectroscopy. It is shown that the Raman shift is mainly due to local heating of the nanowires.
{"title":"Raman spectrum of core-shell silicon nanowires on different substrates","authors":"M. Khorasaninejad, M. Adachi, J. Walia, K. Karim, S. Saini","doi":"10.1109/OMEMS.2012.6318783","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318783","url":null,"abstract":"Silicon nanowires were grown on glass and steel substrates and investigated with Raman spectroscopy. It is shown that the Raman shift is mainly due to local heating of the nanowires.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114691357","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318828
H. Imam, R. Adamson, J. Brown, Yuan Ma
Electrostatically actuated torsional micromirror fabricated using MicroElectroMechanical Systems (MEMS) technology is a fundamental building block for many optical network applications, such as optical wavelength-selective switch, configurable optical add-drop multiplexers and optical cross-connects. A two-dimensional (2D) micro-mirror functioning with a flexible secondary tilting offers tremendous value for the network designers. Commonly, electrostatic MEMS micromirrors have been designed with a gimbal surrounding the mirror plate and four square electrodes underneath. The main disadvantage of this type of design is the X-Y tilts are extensively coupled, which makes design of a control system difficult. In this work, design and control of an electrostatically actuated 2D MEMS micromirror has been reported. Triangular shaped electrodes have been used to achieve relative decoupling and a multi-loop proportional, integral and derivative (PID) controller is designed. The simulation results show that decoupling for small tilting angles has been achieved and that the controller can achieve a larger controllable tilting angle than the pull-in angle resulting in significantly enhanced device performance and functionality.
{"title":"Two-dimensional (2D) micromirror with enhanced tilting angle using active control methods","authors":"H. Imam, R. Adamson, J. Brown, Yuan Ma","doi":"10.1109/OMEMS.2012.6318828","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318828","url":null,"abstract":"Electrostatically actuated torsional micromirror fabricated using MicroElectroMechanical Systems (MEMS) technology is a fundamental building block for many optical network applications, such as optical wavelength-selective switch, configurable optical add-drop multiplexers and optical cross-connects. A two-dimensional (2D) micro-mirror functioning with a flexible secondary tilting offers tremendous value for the network designers. Commonly, electrostatic MEMS micromirrors have been designed with a gimbal surrounding the mirror plate and four square electrodes underneath. The main disadvantage of this type of design is the X-Y tilts are extensively coupled, which makes design of a control system difficult. In this work, design and control of an electrostatically actuated 2D MEMS micromirror has been reported. Triangular shaped electrodes have been used to achieve relative decoupling and a multi-loop proportional, integral and derivative (PID) controller is designed. The simulation results show that decoupling for small tilting angles has been achieved and that the controller can achieve a larger controllable tilting angle than the pull-in angle resulting in significantly enhanced device performance and functionality.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124417817","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318850
N. Saulnier, E. Towe
The extraction efficiency of a laser with a photonic crystal at the top and a distributed Bragg reflector below can be as high as 90% if the reflector is a distance of one period away.
在一个周期的距离上，上有光子晶体，下有分布布拉格反射器的激光器提取效率可高达90%。
{"title":"Improving extraction efficiency of light-emitting devices through use of bottom distributed Bragg reflectors","authors":"N. Saulnier, E. Towe","doi":"10.1109/OMEMS.2012.6318850","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318850","url":null,"abstract":"The extraction efficiency of a laser with a photonic crystal at the top and a distributed Bragg reflector below can be as high as 90% if the reflector is a distance of one period away.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130560217","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318812
R. Bauer, W. Lubeigt, D. Uttamchandani
A comb-drive actuated MEMS scanning mirror is used to actively Q-switch a side-pumped Nd:YAG laser. Minimum pulse durations of 38 ns are observed and maximum average output powers of 55 mW at 17.625 kHz pulse repetition frequency.
{"title":"Q-switching of Nd:YAG solid-state laser with intra-cavity MEMS resonant scanning mirror","authors":"R. Bauer, W. Lubeigt, D. Uttamchandani","doi":"10.1109/OMEMS.2012.6318812","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318812","url":null,"abstract":"A comb-drive actuated MEMS scanning mirror is used to actively Q-switch a side-pumped Nd:YAG laser. Minimum pulse durations of 38 ns are observed and maximum average output powers of 55 mW at 17.625 kHz pulse repetition frequency.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130382454","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 : 2012-10-04DOI: 10.1109/OMEMS.2012.6318808
Li Li, R. Bauer, G. Brown, D. Uttamchandani
A hybrid two-axis scanning micromirror combining electrostatic and electrothermal actuators was fabricated using SOIMUMPs. Experimental evaluation shows the device is capable of scan in two orthogonal directions and produces a rectangular raster-scan pattern.
{"title":"A 2D MEMS scanning micromirror with electrothermal and electrostatic actuators","authors":"Li Li, R. Bauer, G. Brown, D. Uttamchandani","doi":"10.1109/OMEMS.2012.6318808","DOIUrl":"https://doi.org/10.1109/OMEMS.2012.6318808","url":null,"abstract":"A hybrid two-axis scanning micromirror combining electrostatic and electrothermal actuators was fabricated using SOIMUMPs. Experimental evaluation shows the device is capable of scan in two orthogonal directions and produces a rectangular raster-scan pattern.","PeriodicalId":347863,"journal":{"name":"2012 International Conference on Optical MEMS and Nanophotonics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116513898","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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