Performance-Enhanced Bolometric Terahertz Detectors Based on V2O5 for 15 to 30 THz
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- 作者：M. A. Sumesh ; S. P. Karanth ; Beno Thomas…
- 关键词：THz radiation ; Bolometers ; Optical immersion
- 刊名：Journal of Infrared, Millimeter, and Terahertz Waves
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：38
- 期：2
- 页码：135-142
- 全文大小：
- 刊物类别：Physics and Astronomy
- 刊物主题：Electrical Engineering; Electronics and Microelectronics, Instrumentation; Classical Electrodynamics;
- 出版者：Springer US
- ISSN：1866-6906
- 卷排序：38
文摘
Terahertz (THz) radiation perception using uncooled detectors are gaining importance due to the increasing demands in the areas of military, space, and industrial, medical, and surveillance applications. In spite of the efforts of researchers to fill the THz gap, there exists a need for detectors in the range between 15 THz and 30 THz. In this paper, we discuss the development of bolometric detectors whose performance is enhanced by an optical immersion technique and their characterization in the aforesaid range of frequencies. These detectors are characterized by high specific detectivity (D*) of 1.28 × 109 cmHz1/2 W−1 and high radiometric resolution (noise-equivalent temperature difference = 26 mK) and are fast enough for bolometric detectors (time constant = 1.7 ms), which make them suitable for spectroscopic and imaging applications.