Pub Date : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421927
J. Yi
The optical gain properties of the quantum dot arrays fabricated by the edge-defined nanowires have been investigated to quantitatively assess the modulation bandwidth for various minibandgap of the quantum dot arrays on GaN wurtzite substrate.
{"title":"Optical gain properties of quantum dot arrays fabricated by the edge-defined nanowires","authors":"J. Yi","doi":"10.1109/PHOTWTM.2010.5421927","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421927","url":null,"abstract":"The optical gain properties of the quantum dot arrays fabricated by the edge-defined nanowires have been investigated to quantitatively assess the modulation bandwidth for various minibandgap of the quantum dot arrays on GaN wurtzite substrate.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123028812","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421925
J. Motohisa, B. Hua, K. S. Varadwaj, S. Hara, K. Hiruma, T. Fukui
Recently, semiconductor subwavelength nanowires (NWs) have been demonstrated to show laser emission. Representative semiconductor materials fabricating NW lasers are ZnO, GaN and Cad's, etc. Such NW lasers are currently among the smallest known lasing devices, with lengths between one and several tens micrometers and diameter that can be significantly smaller than the emission wavelength in vacuum. For a single-crystalline NW, the end facets form natural mirror surface that create an axial resonator. That is, one-dimensional semiconductor NWs not only act as a gain medium but also a waveguide and a Fabry-Pérot resonator, which provide coherent feedback. The light-emitting capability of the NWs, combined with their other unique features that arise due to their one dimensionality, make them particularly interesting to consider as a candidates for components of future nanoscale photonic systems. However, most advances of NW lasers were successfully realized via wide-bandgap semiconductor materials, giving an ultraviolet or blue laser emission, and little investigation of NW lasers in near-infrared spectral range was reported. Here we describe the growth of GaAs-based NWs using selective-area metalorganic vapor phase epitaxy (SA-MOVPE) and their near-infrared lasing at 810–820 nm wavelengths, inside GaAs/GaAsP core-shell NWs.
{"title":"Lasing in GaAs-based nanowires grown by selective-area MOVPE","authors":"J. Motohisa, B. Hua, K. S. Varadwaj, S. Hara, K. Hiruma, T. Fukui","doi":"10.1109/PHOTWTM.2010.5421925","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421925","url":null,"abstract":"Recently, semiconductor subwavelength nanowires (NWs) have been demonstrated to show laser emission. Representative semiconductor materials fabricating NW lasers are ZnO, GaN and Cad's, etc. Such NW lasers are currently among the smallest known lasing devices, with lengths between one and several tens micrometers and diameter that can be significantly smaller than the emission wavelength in vacuum. For a single-crystalline NW, the end facets form natural mirror surface that create an axial resonator. That is, one-dimensional semiconductor NWs not only act as a gain medium but also a waveguide and a Fabry-Pérot resonator, which provide coherent feedback. The light-emitting capability of the NWs, combined with their other unique features that arise due to their one dimensionality, make them particularly interesting to consider as a candidates for components of future nanoscale photonic systems. However, most advances of NW lasers were successfully realized via wide-bandgap semiconductor materials, giving an ultraviolet or blue laser emission, and little investigation of NW lasers in near-infrared spectral range was reported. Here we describe the growth of GaAs-based NWs using selective-area metalorganic vapor phase epitaxy (SA-MOVPE) and their near-infrared lasing at 810–820 nm wavelengths, inside GaAs/GaAsP core-shell NWs.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121363615","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421958
S. Aleksic
Four realization options of large switching fabrics are evaluated with respect to total electrical power consumption. The considered options include circuit and packet switches realized using either electronic (CMOS) or optical (SOA, MEMS) technologies.
{"title":"Electrical power consumption of large electronic and optical switching fabrics","authors":"S. Aleksic","doi":"10.1109/PHOTWTM.2010.5421958","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421958","url":null,"abstract":"Four realization options of large switching fabrics are evaluated with respect to total electrical power consumption. The considered options include circuit and packet switches realized using either electronic (CMOS) or optical (SOA, MEMS) technologies.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"33 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125694462","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421942
A. Bilenca
The use of low-level light radiation, such as fluorescence, is central for tackling measurement problems in biology and medicine with high sensitivity and at high, multidimensional optical resolution. Typically, the intensity of low-level light waves is utilized and simply measured by ultra-sensitive detection systems. Nevertheless, the phase of a these optical waves contains subtle, but no less important, information about the observed medium; yet, it has been largely unexplored. Here, we introduce the concept of fluorescent light interferometry to open up new possibilities for measuring fluorescence phase information through biological matter with nanometer-to-mesoscopic level resolution.
{"title":"Fluorescence interferometry: From mesoscopic to nanoscopic biomedical imaging","authors":"A. Bilenca","doi":"10.1109/PHOTWTM.2010.5421942","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421942","url":null,"abstract":"The use of low-level light radiation, such as fluorescence, is central for tackling measurement problems in biology and medicine with high sensitivity and at high, multidimensional optical resolution. Typically, the intensity of low-level light waves is utilized and simply measured by ultra-sensitive detection systems. Nevertheless, the phase of a these optical waves contains subtle, but no less important, information about the observed medium; yet, it has been largely unexplored. Here, we introduce the concept of fluorescent light interferometry to open up new possibilities for measuring fluorescence phase information through biological matter with nanometer-to-mesoscopic level resolution.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128624309","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421955
O. Kamatani, Hirokazu Takahashi, M. Takizawa, A. Tsutsui, O. Ishida, V. Vishwanath, Sungwon Nam, L. Renambot, J. Leigh
Terabit/s-scalable end-to-end parallel networking architecture (TLAN) based on virtual optical resource control for a high-end scientific application is outlined. Multi-rail- and Multi-lane-aware networking architecture, the relevant photonic technologies, the requirements of optical devices and interfaces for TLAN optical node deployments are also discussed.
{"title":"Terabit/s-scalable end-to-end parallel networking architecture (TLAN) based on virtual optical resource control","authors":"O. Kamatani, Hirokazu Takahashi, M. Takizawa, A. Tsutsui, O. Ishida, V. Vishwanath, Sungwon Nam, L. Renambot, J. Leigh","doi":"10.1109/PHOTWTM.2010.5421955","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421955","url":null,"abstract":"Terabit/s-scalable end-to-end parallel networking architecture (TLAN) based on virtual optical resource control for a high-end scientific application is outlined. Multi-rail- and Multi-lane-aware networking architecture, the relevant photonic technologies, the requirements of optical devices and interfaces for TLAN optical node deployments are also discussed.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126894844","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421937
Kevin R. Koh, R. Newton, S. Ghaem-Maghami, Guang-Zhong Yang, D. Elson
Ovarian cancer is often diagnosed late, and the assessment of its response to chemotherapy typically takes several months using current methods. Utilising a novel probe-based fluorescence confocal endomicroscopy (FCE) approach, we have 1) established the most appropriate exogenous contrast agent for use in this setting, 2) demonstrated that cell attrition and morphological changes caused by platinum-based chemotherapy treatment can be tracked via this technique, 3) characterised the morphological differences between normal and cancerous ovarian epithelium, and 4) shown that the FCE imaging system can detect 5-aminolevulinic acid-induced protoporphyrin IX (PpIX) autofluorescence from in vitro ovarian cancer cell lines and ex vivo small cell lung cancer tissue. It is expected that FCE may play a role in morphological and functional imaging for the early diagnosis and treatment of ovarian cancer.
{"title":"Characterising ovarian cancer morphology and response to chemotherapy using fluorescence confocal endomicroscopy","authors":"Kevin R. Koh, R. Newton, S. Ghaem-Maghami, Guang-Zhong Yang, D. Elson","doi":"10.1109/PHOTWTM.2010.5421937","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421937","url":null,"abstract":"Ovarian cancer is often diagnosed late, and the assessment of its response to chemotherapy typically takes several months using current methods. Utilising a novel probe-based fluorescence confocal endomicroscopy (FCE) approach, we have 1) established the most appropriate exogenous contrast agent for use in this setting, 2) demonstrated that cell attrition and morphological changes caused by platinum-based chemotherapy treatment can be tracked via this technique, 3) characterised the morphological differences between normal and cancerous ovarian epithelium, and 4) shown that the FCE imaging system can detect 5-aminolevulinic acid-induced protoporphyrin IX (PpIX) autofluorescence from in vitro ovarian cancer cell lines and ex vivo small cell lung cancer tissue. It is expected that FCE may play a role in morphological and functional imaging for the early diagnosis and treatment of ovarian cancer.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126784523","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421941
Meng Cui, Emily J. McDowell, Changhuei Yang
Elastic optical scattering in biological tissue typically dominates over absorption by an order of magnitude or more. Being the dominant light interaction process, scattering prevents tissue from being transparent. Although the spectral properties [1] and angular profiles [2] of scattered light can reveal useful physiological information about a given tissue sample, scattered light is generally regarded as poor in imaging information. This is due to the severe deterioration of the incident light field, caused by disordered amplitude and phase modulation of its wavefront as it propagates through the tissue. Yet, it is also known that elastic optical scattering is a deterministic and time reversible process. In other words, if we can record the phase and amplitude of the propagating scattered light field completely and reproduce a back propagating optical phase conjugate (OPC) field or a time‐ reversed light field this field should be able to retrace its trajectory through the scattering medium and return the original input light field.
{"title":"Turning tissues transparent by optical phase conjugation","authors":"Meng Cui, Emily J. McDowell, Changhuei Yang","doi":"10.1109/PHOTWTM.2010.5421941","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421941","url":null,"abstract":"Elastic optical scattering in biological tissue typically dominates over absorption by an order of magnitude or more. Being the dominant light interaction process, scattering prevents tissue from being transparent. Although the spectral properties [1] and angular profiles [2] of scattered light can reveal useful physiological information about a given tissue sample, scattered light is generally regarded as poor in imaging information. This is due to the severe deterioration of the incident light field, caused by disordered amplitude and phase modulation of its wavefront as it propagates through the tissue. Yet, it is also known that elastic optical scattering is a deterministic and time reversible process. In other words, if we can record the phase and amplitude of the propagating scattered light field completely and reproduce a back propagating optical phase conjugate (OPC) field or a time‐ reversed light field this field should be able to retrace its trajectory through the scattering medium and return the original input light field.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127133388","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421973
A. Sell, G. Krauss, T. Kampfrath, M. Wolf, A. Leitenstorfer, R. Huber
Widely tunable phase-locked THz transients with electric and magnetic fields exceeding 100 MV/cm are generated by a novel table-top laser. These pulses are able to drive non-per-turbative optical nonlinearities by electric and magnetic coupling.
{"title":"Terahertz fields beyond 100 MV/cm -new radiation for basic research","authors":"A. Sell, G. Krauss, T. Kampfrath, M. Wolf, A. Leitenstorfer, R. Huber","doi":"10.1109/PHOTWTM.2010.5421973","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421973","url":null,"abstract":"Widely tunable phase-locked THz transients with electric and magnetic fields exceeding 100 MV/cm are generated by a novel table-top laser. These pulses are able to drive non-per-turbative optical nonlinearities by electric and magnetic coupling.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123588506","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421956
Hirokazu Takahashi, Takehito Yamamoto, M. Takizawa, O. Kamatani, Sungwon Nam, L. Renambot, J. Leigh, V. Vishwanath
This paper describes experiments to explore the scalability of the MultiRail technology. MultiRail leverages endhost parallel resources to achieve large bandwidth. We confirm that MultiRail scales bandwidth by better utilizing the parallel resources.
{"title":"Leveraging end-host parallelism to achieve scalable communication bandwidth utilization","authors":"Hirokazu Takahashi, Takehito Yamamoto, M. Takizawa, O. Kamatani, Sungwon Nam, L. Renambot, J. Leigh, V. Vishwanath","doi":"10.1109/PHOTWTM.2010.5421956","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421956","url":null,"abstract":"This paper describes experiments to explore the scalability of the MultiRail technology. MultiRail leverages endhost parallel resources to achieve large bandwidth. We confirm that MultiRail scales bandwidth by better utilizing the parallel resources.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130873121","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 : 2010-02-25DOI: 10.1109/PHOTWTM.2010.5421969
J. Hebling, J. Fulop, L. Pálfalvi, G. Almási
The generation of THz pulses having tens of microjoules energy by tilted pulse-front excitation is reviewed. Possibilities of further up-scaling the THz energy as well as existing and future applications of these pulses are analyzed.
{"title":"Intense terahertz sources based on tilted pulse-front excitation and their potential applications in imaging, nonlinear THz spectroscopy and attosecond pulse generation","authors":"J. Hebling, J. Fulop, L. Pálfalvi, G. Almási","doi":"10.1109/PHOTWTM.2010.5421969","DOIUrl":"https://doi.org/10.1109/PHOTWTM.2010.5421969","url":null,"abstract":"The generation of THz pulses having tens of microjoules energy by tilted pulse-front excitation is reviewed. Possibilities of further up-scaling the THz energy as well as existing and future applications of these pulses are analyzed.","PeriodicalId":367324,"journal":{"name":"2010 IEEE Photonics Society Winter Topicals Meeting Series (WTM)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130493692","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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