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20 May 2011 Development of terahertz focal plane arrays and handy camera
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Uncooled Terahertz (THz) focal plane array (FPA), 320x240 format-23.5 μm pitch, and THz imager were developed. There are two types of THz-FPAs, i.e., broad-band type and narrow-band type. Since broad-band type THz-FPA was developed, a couple of modifications have been made to improve Noise Equivalent Power. The narrow-band type THz-FPA has such a new structure that Si cover is put above thermal isolation structure of broad-band type THz-FPA at a distance of half of wavelength of interest. Measurements on responsivities of narrow-band type FPAs show enhancement by a factor of ca. 3. Lock-in imaging technique has been developed, which increases signal-to-noise ratio as a function of square root of the number of frames of integration. Both passive and active THz imaging experiments were finally described.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Naoki Oda, Masahiko Sano, Ken'ichi Sonoda, Hajime Yoneyama, Seiji Kurashina, Masaru Miyoshi, Tokuhito Sasaki, Iwao Hosako, Norihiko Sekine, Takayuki Sudou, and Shuichi Ohkubo "Development of terahertz focal plane arrays and handy camera", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80121B (20 May 2011);

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