Pub Date : 2007-11-12DOI: 10.1109/LEOS.2007.4382261
H. Chien, C.-A. Chen, D.-C. Wu, M.-H. Mao
Whispering-gallery modes and radial modes in quantum-dot microdisks were observed at 77 K and RT, respectively. The quality factor at 77 K is determined to be larger than 14000. The radial modes can be suppressed with embedding a hole at the microdisk center.
{"title":"High-quality-factor quantum-dot microdisk lasers and their modal behaviors","authors":"H. Chien, C.-A. Chen, D.-C. Wu, M.-H. Mao","doi":"10.1109/LEOS.2007.4382261","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382261","url":null,"abstract":"Whispering-gallery modes and radial modes in quantum-dot microdisks were observed at 77 K and RT, respectively. The quality factor at 77 K is determined to be larger than 14000. The radial modes can be suppressed with embedding a hole at the microdisk center.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122628782","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382371
Min‐Kyo Seo, Kwang-Yong Jeong, Jin-Kyu Yang, Se‐Heon Kim, Yong-Hee Lee, Sung-Bock Kim
We report low threshold current single-cell photonic-crystal lasers with InGaAsP quantum-wells at room temperature. The central current post and waveguides coupled to single-cell PhC cavity generate single hexapole mode lasing action by suppressing quadrupole modes.
{"title":"Electrically-driven single hexapole mode photonic crystal laser using parity-selective mirrors","authors":"Min‐Kyo Seo, Kwang-Yong Jeong, Jin-Kyu Yang, Se‐Heon Kim, Yong-Hee Lee, Sung-Bock Kim","doi":"10.1109/LEOS.2007.4382371","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382371","url":null,"abstract":"We report low threshold current single-cell photonic-crystal lasers with InGaAsP quantum-wells at room temperature. The central current post and waveguides coupled to single-cell PhC cavity generate single hexapole mode lasing action by suppressing quadrupole modes.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122958885","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382607
C. Huang, D. Leaird, S.-G. Park, A. Weiner
Optical coherence of 9.953 GHz nonlinearly broadened phase-modulated CW laser combs using normal and anomalous dispersive media are experimentally characterized using a DPSK encoder/decoder. Normal-dispersion-broadened combs show good DPSK compatibility.
{"title":"Coherence Examination of Nonlinearly Broadened Phase-Modulated CW Laser Frequency Combs using a DPSK Encoder/Decoder","authors":"C. Huang, D. Leaird, S.-G. Park, A. Weiner","doi":"10.1109/LEOS.2007.4382607","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382607","url":null,"abstract":"Optical coherence of 9.953 GHz nonlinearly broadened phase-modulated CW laser combs using normal and anomalous dispersive media are experimentally characterized using a DPSK encoder/decoder. Normal-dispersion-broadened combs show good DPSK compatibility.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114445287","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382466
C. McMillen, J. Kolis, J. Ballato
Single crystals of Sc2O3 and Ln:Sc2O3 (Ln = Er, Yb, Ho, Tm) have been synthesized hydrothermally. Some initial spectroscopic properties of these interesting materials are discussed.
用水热法合成了Sc2O3和Ln:Sc2O3单晶(Ln = Er, Yb, Ho, Tm)。讨论了这些有趣材料的一些初始光谱性质。
{"title":"Growth and Properties of Doped Scandia Crystals","authors":"C. McMillen, J. Kolis, J. Ballato","doi":"10.1109/LEOS.2007.4382466","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382466","url":null,"abstract":"Single crystals of Sc<sub>2</sub>O<sub>3</sub> and Ln:Sc<sub>2</sub>O<sub>3</sub> (Ln = Er, Yb, Ho, Tm) have been synthesized hydrothermally. Some initial spectroscopic properties of these interesting materials are discussed.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117250302","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382599
C. Kim, Mijin Kim, W. Bewley, C. Canedy, J. Nolde, D. Larrabee, J. Ryan Lindle, I. Vurgaftman, J. R. Meyer
We report the operation of an interband cascade-based DFB laser in the mid-IR. The device operates single-mode from 78 to 160 K, with up to 10 nm of current tuning and quasi-continuous tuning of 26 nm by also varying temperature.
{"title":"Single-chip Interband Cascade DFB laser with Extended Tuning Range","authors":"C. Kim, Mijin Kim, W. Bewley, C. Canedy, J. Nolde, D. Larrabee, J. Ryan Lindle, I. Vurgaftman, J. R. Meyer","doi":"10.1109/LEOS.2007.4382599","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382599","url":null,"abstract":"We report the operation of an interband cascade-based DFB laser in the mid-IR. The device operates single-mode from 78 to 160 K, with up to 10 nm of current tuning and quasi-continuous tuning of 26 nm by also varying temperature.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128738290","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382636
F. Wise
A new pulse-shaping process enables the construction of the first femtosecond lasers that do not require intracavity dispersion control. These lasers generate pulses with energies 10-20 nJ, comparable to the performance of solid-state lasers.
{"title":"Femtosecond Fiber Lasers: Performance of Solid-State with the Benefits of Fiber","authors":"F. Wise","doi":"10.1109/LEOS.2007.4382636","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382636","url":null,"abstract":"A new pulse-shaping process enables the construction of the first femtosecond lasers that do not require intracavity dispersion control. These lasers generate pulses with energies 10-20 nJ, comparable to the performance of solid-state lasers.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128338681","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382342
J. Mora, J. Capmany, L.R. Chen
We demonstrate experimentally and theoretically discrete tuning and reconfiguration of a single bandpass photonic microwave filter based on a sinusoidal and continuous optical weight sample distribution implemented with a high-birefringence Sagnac loop and DWDM channel selector.
{"title":"Tunable and reconfigurable single bandpass photonic microwave filter using a high-birefringence Sagnac loop and DWDM channel selector","authors":"J. Mora, J. Capmany, L.R. Chen","doi":"10.1109/LEOS.2007.4382342","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382342","url":null,"abstract":"We demonstrate experimentally and theoretically discrete tuning and reconfiguration of a single bandpass photonic microwave filter based on a sinusoidal and continuous optical weight sample distribution implemented with a high-birefringence Sagnac loop and DWDM channel selector.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129326925","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382334
P. Fauchet
Summary form only given.Commercial ultrafiltration and dialysis membranes have broad pore size distributions and are several orders of magnitude thicker than the molecules they are designed to separate, leading to poor size cutoff properties, filtrate loss within the membranes, and low transport rates. Nanofabricated membranes have great potential in molecular separation applications by offering more precise structural control, but either they are fragile and their preparation is cumbersome and expensive, or transport through them is still limited by mum-scale thicknesses. In this presentation, we describe a novel ultrathin porous nanocrystalline silicon membrane manufactured using straightforward silicon fabrication techniques and providing control over average pore sizes from <5 nm to >25 nm. These novel membranes can retain proteins while permitting the transport of small molecules at rates one order of magnitude or more faster than existing materials, separate differently sized proteins under physiological conditions, and separate similarly sized molecules carrying different charges. Despite being only several nm thick, such large-area, free-standing membranes can support a full atmosphere of differential pressure without plastic deformation or fracture. By providing efficient, low-loss macromolecule separations, these membranes are expected to enable a variety of new devices, including membrane-based chromatography systems and both analytical and preparative microfluidic systems that require highly efficient separations, including optical biosensors. In this presentation, the manufacture and physical properties of the membranes will be presented, several examples of their use for molecular separation will be discussed, and future applications in research and development as well as in the commercial sector will be outlined.
{"title":"Charge- and size-based separation of macromolecules using novel ultrathin silicon membranes","authors":"P. Fauchet","doi":"10.1109/LEOS.2007.4382334","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382334","url":null,"abstract":"Summary form only given.Commercial ultrafiltration and dialysis membranes have broad pore size distributions and are several orders of magnitude thicker than the molecules they are designed to separate, leading to poor size cutoff properties, filtrate loss within the membranes, and low transport rates. Nanofabricated membranes have great potential in molecular separation applications by offering more precise structural control, but either they are fragile and their preparation is cumbersome and expensive, or transport through them is still limited by mum-scale thicknesses. In this presentation, we describe a novel ultrathin porous nanocrystalline silicon membrane manufactured using straightforward silicon fabrication techniques and providing control over average pore sizes from <5 nm to >25 nm. These novel membranes can retain proteins while permitting the transport of small molecules at rates one order of magnitude or more faster than existing materials, separate differently sized proteins under physiological conditions, and separate similarly sized molecules carrying different charges. Despite being only several nm thick, such large-area, free-standing membranes can support a full atmosphere of differential pressure without plastic deformation or fracture. By providing efficient, low-loss macromolecule separations, these membranes are expected to enable a variety of new devices, including membrane-based chromatography systems and both analytical and preparative microfluidic systems that require highly efficient separations, including optical biosensors. In this presentation, the manufacture and physical properties of the membranes will be presented, several examples of their use for molecular separation will be discussed, and future applications in research and development as well as in the commercial sector will be outlined.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129538008","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382641
C. C. Renaud, D. Moodie, Michael J. Robertson, A. Seeds
We present a waveguide uni-travelling carrier photodetector with a bandwidth greater than 110 GHz and record breaking power of 10 dBm extracted at 110 GHz.
{"title":"High Output Power at 110 GHz with a Waveguide Uni-Travelling Carrier photodiode","authors":"C. C. Renaud, D. Moodie, Michael J. Robertson, A. Seeds","doi":"10.1109/LEOS.2007.4382641","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382641","url":null,"abstract":"We present a waveguide uni-travelling carrier photodetector with a bandwidth greater than 110 GHz and record breaking power of 10 dBm extracted at 110 GHz.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129931208","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 : 2007-11-12DOI: 10.1109/LEOS.2007.4382382
T. Asano, S. Noda
Recent progress of photonic nanocavities in two-dimensional photonic crystal slabs is described. Experimentally, a cavity having a Q factor of 2 million and a photon lifetime of 1.7 ns is shown. Theoretically, a systematic cavity design method which enables a Q factor of 109 is described. Dynamic tuning of the Q factor is also discussed.
{"title":"Ultra-high-Q Photonic Nanocavities","authors":"T. Asano, S. Noda","doi":"10.1109/LEOS.2007.4382382","DOIUrl":"https://doi.org/10.1109/LEOS.2007.4382382","url":null,"abstract":"Recent progress of photonic nanocavities in two-dimensional photonic crystal slabs is described. Experimentally, a cavity having a Q factor of 2 million and a photon lifetime of 1.7 ns is shown. Theoretically, a systematic cavity design method which enables a Q factor of 109 is described. Dynamic tuning of the Q factor is also discussed.","PeriodicalId":110592,"journal":{"name":"LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126848945","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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