排序方式: 共有5条查询结果,搜索用时 0 毫秒
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Kasalynas I. Adam A.J.L. Klaassen T.O. Hovenier J.N. Pandraud G. Iordanov V.P. Sarro P.M. 《IEEE journal of selected topics in quantum electronics》2008,14(2):363-369
A simple mass producible detection array for terahertz radiation has been designed and fabricated. The 1 mm times 1 mm pixels consist of a 0.5 mm times 0.5 mm thin-film absorber on a membrane, supported by 0.28-mm-wide silicon separation beams. Thermopiles are used to measure the temperature increase of the absorber. The 5 ms thermal time constant of the detector, together with the noise equivalent power of 1 nW/Hz1/2, enables real-time imaging at 50 frames/s with a signal-to-noise ratio of 10 for an optical intensity of 30 muW/cm2. 相似文献
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Kasalynas I. Seliuta D. Simniskis R. Tamosiunas V. Kohler K. Valusis G. 《Electronics letters》2009,45(16):833-835
A silicon-lens coupled bow-tie InGaAs-based diode with broken symmetry is demonstrated for terahertz imaging applications below 1 THz at room temperature. Transient features and the dynamic range of the bow-tie InGaAs-based sensor are explored experimentally, proving the possibility to use the device in real-time imaging systems. Response time is found to be less than 7 ns, responsivity of 0.1 mA/W, and noise equivalent power of 5.8 nW/radicHz. 相似文献
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Wojciech Knap Mikhail Dyakonov Dominique Coquillat Frederic Teppe Nina Dyakonova Jerzy Łusakowski Krzysztof Karpierz Maciej Sakowicz Gintaras Valusis Dalius Seliuta Irmantas Kasalynas Abdelouahad El Fatimy Y. M. Meziani Taiichi Otsuji 《Journal of Infrared, Millimeter and Terahertz Waves》2009,30(12):1319-1337
Resonant frequencies of the two-dimensional plasma in FETs increase with the reduction of the channel dimensions and can reach the THz range for sub-micron gate lengths. Nonlinear properties of the electron plasma in the transistor channel can be used for the detection and mixing of THz frequencies. At cryogenic temperatures resonant and gate voltage tunable detection related to plasma waves resonances is observed. At room temperature, when plasma oscillations are overdamped, the FET can operate as an efficient broadband THz detector. We present the main theoretical and experimental results on THz detection by FETs in the context of their possible application for THz imaging. 相似文献
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Anbinderis T. Anbinderis P. Usoris A.-V. Bagdonaite P. Prusakova E. Kasalynas I. Sirmulis E. Seliuta D. Valusis G. 《Electronics letters》2007,43(14)
A calorimeter for absolute power measurements within the 0.1- 30 THz frequency range is presented and the calibration factor is estimated. Innovations in the design have allowed simplification of direct reading of incident microwave power. 相似文献
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Wojciech Knap Salman Nadar Hadley Videlier Stephane Boubanga-Tombet Dominique Coquillat Nina Dyakonova Frederic Teppe Kristoph Karpierz Jerzy ?usakowski Maciej Sakowicz Irmantas Kasalynas Dalius Seliuta Gintaras Valusis Taiichi Otsuji Yahya Meziani Abdel El Fatimy Simon Vandenbrouk Kamel Madjour Didier Th��ron Christophe Gaqui��re 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(5):618-628
Resonant frequencies of the two-dimensional plasma in field effect transistors (FETs) increase with the reduction of the channel dimensions and can reach the Terahertz (THz) range. Nonlinear properties of the plasma/electron gas in the transistor channel can be used for the rectification and detection of THz radiation. The excitation of plasma waves by sub-THz and THz radiation was demonstrated for short gate transistors at cryogenic temperatures. At room temperature plasma oscillations are usually overdamped, but the FETs can still operate as efficient broadband rectifiers/detectors in the THz range. We present a few recent experimental results on THz detection by FETs showing some new ways of improvement of FETs for THz imaging at room temperature as well as the new physical phenomena like detection in quantizing magnetic fields. We also demonstrate THz emission properties of GaN based FETs. 相似文献
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