A high sensitivity THz detector

Su, Bo; Duan, Guoteng

doi:10.1117/12.900992

Cited by 3 publications

(2 citation statements)

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“…Additional difficulties exist when the detection range is extended to the THz region. The low thermal background power in THz demands highly sensitive detectors and, in most cases, external THz illumination is also required [7][8][9][10][11][12]. The lack of fabrication-friendly natural materials exhibiting high THz absorption makes metamaterial absorbers tuned to THz frequencies very attractive.…”

Section: Introductionmentioning

confidence: 99%

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Bi-material terahertz sensors using metamaterial structures

Alves¹,

Grbovic²,

Kearney³

et al. 2013

Opt. Express

110

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Abstract:In this paper we report on the design, fabrication and characterization of terahertz (THz) bi-material sensors with metamaterial absorbers. MEMS fabrication-friendly SiO x and Al are used to maximize the bimetallic effect and metamaterial absorption at 3.8 THz, the frequency of a quantum cascade laser illumination source. Sensors with different configurations were fabricated and the measured absorption is near 100% and responsivity is around 1.2 deg/μW, which agree well with finite element simulations. The results indicate the potential of using these detectors to fabricate focal plane arrays for real time THz imaging.

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