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학술지 InGaAs Schottky Barrier Diode Array Detector for a Real-Time Compact Terahertz Line Scanner
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저자
한상필, 고현성, 박정우, 김남제, 윤영종, 신준환, 김대용, 이동훈, 박경현
발행일
201311
출처
Optics Express, v.21 no.22, pp.25874-25882
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.21.025874
초록
We present a terahertz (THz) broadband antenna-integrated 1 × 20 InGaAs Schottky barrier diode (SBD) array detector with an average responsivity of 98.5 V/W at a frequency of 250 GHz, which is measured without attaching external amplifiers and Si lenses, and an average noise equivalent power (NEP) of 106.6 pW/?닖Hz. The 3-dB bandwidth of the SBD detector is also investigated at approximately 180 GHz. For implementing an array-type SBD detector by a simple fabrication process to achieve a high yield, a structure comprising an SiNx layer instead of an air bridge between the anode and the cathode is designed. THz line beam imaging using a Gunn diode emitter with a center frequency of 250 GHz and a 1 × 20 SBD array detector is successfully demonstrated. ©2013 Optical Society of America.
KSP 제안 키워드
180 GHz, 250 GHz, 3-dB bandwidth, Array-type, Broadband antennas, Center frequency, Diode array detector, Gunn diode, High yield, Line beam, Real-time compact