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학술지 Real-Time Continuous-Wave Terahertz Line Scanner Based on a Compact 1 × 240 InGaAs Schottky Barrier Diode Array Detector
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저자
한상필, 고현성, 김남제, 이원희, 문기원, 이일민, 이의수, 이동훈, 이왕주, 한성태, 최성욱, 박경현
발행일
201412
출처
Optics Express, v.22 no.23, pp.28977-28983
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.22.028977
협약과제
14ZE1100, ETRI 창의연구실 사업, 손승원
초록
We demonstrate real-time continuous-wave terahertz (THz) line-scanned imaging based on a 1 × 240 InGaAs Schottky barrier diode (SBD) array detector with a scan velocity of 25 cm/s, a scan line length of 12 cm, and a pixel size of 0.5 × 0.5 mm2. Foreign substances, such as a paper clip with a spatial resolution of approximately 1 mm that is hidden under a cracker, are clearly detected by this THz line-scanning system. The system consists of the SBD array detector, a 200-GHz gyrotron source, a conveyor system, and several optical components such as a high-density polyethylene cylindrical lens, metal cylindrical mirror, and THz wire-grid polarizer. Using the THz polarizer, the signal-to-noise ratio of the SBD array detector improves because the quality of the source beam is enhanced.
KSP 제안 키워드
Continuous-wave terahertz, Conveyor System, Cylindrical lens, Diode array detector, High-density polyethylene(HDPE), Pixel size, Real-Time, Scan line, Scanning System, Schottky barriers(SBs), Signal noise ratio(SNR)