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Highly-Sensitive Thin Film THz Detector Based on Edge Metal-Semiconductor-Metal Junction.

ABSTRACT: Terahertz (THz) detectors have been extensively studied for various applications such as security, wireless communication, and medical imaging. In case of metal-insulator-metal (MIM) tunnel junction THz detector, a small junction area is desirable because the detector response time can be shortened by reducing it. An edge metal-semiconductor-metal (EMSM) junction has been developed with a small junction area controlled precisely by the thicknesses of metal and semiconductor films. The voltage response of the EMSM THz detector shows the clear dependence on the polarization angle of incident THz wave and the responsivity is found to be very high (~2,169 V/W) at 0.4?THz without any antenna and signal amplifier. The EMSM junction structure can be a new and efficient way of fabricating the nonlinear device THz detector with high cut-off frequency relying on extremely small junction area.

SUBMITTER: Jeon Y

PROVIDER: S-EPMC5715053 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Highly-Sensitive Thin Film THz Detector Based on Edge Metal-Semiconductor-Metal Junction.

Jeon Youngeun Y Jung Sungchul S Jin Hanbyul H Mo Kyuhyung K Kim Kyung Rok KR Park Wook-Ki WK Han Seong-Tae ST Park Kibog K

Scientific reports 20171204 1

Terahertz (THz) detectors have been extensively studied for various applications such as security, wireless communication, and medical imaging. In case of metal-insulator-metal (MIM) tunnel junction THz detector, a small junction area is desirable because the detector response time can be shortened by reducing it. An edge metal-semiconductor-metal (EMSM) junction has been developed with a small junction area controlled precisely by the thicknesses of metal and semiconductor films. The voltage re ...[more]

PMID: 29203788

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