Advanced materials (Deerfield Beach, Fla.), Jan 13, 2015
In this work, a heterojunction between crystalline silicon and colloidal quantum dots (CQDs) is r... more In this work, a heterojunction between crystalline silicon and colloidal quantum dots (CQDs) is realized. A special interface modification is developed to overcome an inherent energetic band mismatch between the two semiconductors, and realize the efficient collection of infrared photocarriers generated in the CQD film. This junction is used to produce a sensitive near infrared photodetector.
Optical communication today relies on discrete active optoelectronic components. It is necessary ... more Optical communication today relies on discrete active optoelectronic components. It is necessary to produce active optoelectronic devices, operating at communications wavelengths, that can be integrated with any substrate including but not limited to silicon. In this paper, monolithically-integrated solution-processed infrared active optoelectronics in the synthesis and optimization of colloidal quantum dots
An agile, transparent optical network is emerging. This paper enumerates the functions that will ... more An agile, transparent optical network is emerging. This paper enumerates the functions that will be needed at nodes in order to add transparency and agility to the network while robustly assuring optical fibre channel performance. One key requirement will be scalable integration of multiple functions on a platform. The paper presents recent results along one strategic axis for integration -the use of functionalized self-organized photonic crystals and heterostructures thereof to control the flow and features of light.
We analyze waveguiding in cylindrical structures in colloidal photonic crystals. We compare guide... more We analyze waveguiding in cylindrical structures in colloidal photonic crystals. We compare guides with air cores and raised-index cores in terms of mode shape and number of modes as a function of size.
IEEE International Conference on Communications, 2003. ICC '03., 2003
The utilization, defined as the throughput normalized to the time-domain processing gain, is used... more The utilization, defined as the throughput normalized to the time-domain processing gain, is used as metric to compare the performance of optical code-division multiple-access (WDMA) local-area networks. The impact of shot and thermal noise, as well as multiple-access interference (MAI) for the O-CDMA system, is taken into account. We find that a low offered loads or low received power levels,
Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2002
Summary form only given. We report the results of calibrated high-spatial-resolution SSRM measure... more Summary form only given. We report the results of calibrated high-spatial-resolution SSRM measurement, showing that we are able to resolve individual quantum wells and determine the activated doping of the p-n-p-n thyristor current blocking layers of a BH MQW laser.
We review progress in novel semiconductor lasers positioned to enable planar optoelectronic integ... more We review progress in novel semiconductor lasers positioned to enable planar optoelectronic integration and to facilitate the realization of functional photonic devices. Lateral injection of current into the active region of a semiconductor laser has been pursued, mostly empirically, since the early 1970s. In this work, we focus on recent advances in the development of a device model which accounts for the qualitative structural and operational dierences between lateral and conventional vertical injection lasers. We review fabrication methods Ð both established and emerging Ð suitable for LCI laser realization. Finally, we report the results of recent combined theoretical±experimental explorations of laser performance. #
Advanced materials (Deerfield Beach, Fla.), Jan 13, 2015
In this work, a heterojunction between crystalline silicon and colloidal quantum dots (CQDs) is r... more In this work, a heterojunction between crystalline silicon and colloidal quantum dots (CQDs) is realized. A special interface modification is developed to overcome an inherent energetic band mismatch between the two semiconductors, and realize the efficient collection of infrared photocarriers generated in the CQD film. This junction is used to produce a sensitive near infrared photodetector.
Optical communication today relies on discrete active optoelectronic components. It is necessary ... more Optical communication today relies on discrete active optoelectronic components. It is necessary to produce active optoelectronic devices, operating at communications wavelengths, that can be integrated with any substrate including but not limited to silicon. In this paper, monolithically-integrated solution-processed infrared active optoelectronics in the synthesis and optimization of colloidal quantum dots
An agile, transparent optical network is emerging. This paper enumerates the functions that will ... more An agile, transparent optical network is emerging. This paper enumerates the functions that will be needed at nodes in order to add transparency and agility to the network while robustly assuring optical fibre channel performance. One key requirement will be scalable integration of multiple functions on a platform. The paper presents recent results along one strategic axis for integration -the use of functionalized self-organized photonic crystals and heterostructures thereof to control the flow and features of light.
We analyze waveguiding in cylindrical structures in colloidal photonic crystals. We compare guide... more We analyze waveguiding in cylindrical structures in colloidal photonic crystals. We compare guides with air cores and raised-index cores in terms of mode shape and number of modes as a function of size.
IEEE International Conference on Communications, 2003. ICC '03., 2003
The utilization, defined as the throughput normalized to the time-domain processing gain, is used... more The utilization, defined as the throughput normalized to the time-domain processing gain, is used as metric to compare the performance of optical code-division multiple-access (WDMA) local-area networks. The impact of shot and thermal noise, as well as multiple-access interference (MAI) for the O-CDMA system, is taken into account. We find that a low offered loads or low received power levels,
Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2002
Summary form only given. We report the results of calibrated high-spatial-resolution SSRM measure... more Summary form only given. We report the results of calibrated high-spatial-resolution SSRM measurement, showing that we are able to resolve individual quantum wells and determine the activated doping of the p-n-p-n thyristor current blocking layers of a BH MQW laser.
We review progress in novel semiconductor lasers positioned to enable planar optoelectronic integ... more We review progress in novel semiconductor lasers positioned to enable planar optoelectronic integration and to facilitate the realization of functional photonic devices. Lateral injection of current into the active region of a semiconductor laser has been pursued, mostly empirically, since the early 1970s. In this work, we focus on recent advances in the development of a device model which accounts for the qualitative structural and operational dierences between lateral and conventional vertical injection lasers. We review fabrication methods Ð both established and emerging Ð suitable for LCI laser realization. Finally, we report the results of recent combined theoretical±experimental explorations of laser performance. #
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Papers by Edward Sargent