All-optical THz wave switching based on CH3NH3PbI3 perovskites | Zendy

Kyusup Lee | Zendy; Rira Kang | Zendy; Byungwoo Son | Zendy; DongYu Kim | Zendy; Nan Yu | Zendy; DoKyeong Ko | Zendy

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All-optical THz wave switching based on CH3NH3PbI3 perovskites

Author(s) -

Kyusup Lee,

Rira Kang,

Byungwoo Son,

DongYu Kim,

Nan Yu,

DoKyeong Ko

Publication year - 2016

Publication title -

scientific reports

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.24

H-Index - 213

ISSN - 2045-2322

DOI - 10.1038/srep37912

Subject(s) - terahertz radiation , perovskite (structure) , optoelectronics , materials science , laser , photovoltaics , silicon , optics , photovoltaic system , chemistry , physics , electrical engineering , crystallography , engineering

Hybrid structures of silicon with organic–inorganic perovskites are proposed for optically controllable switching of terahertz (THz) waves over a broad spectral range from 0.2 to 2THz. A 532-nm external laser was utilized to generate photoexcited free carriers at the devices and consequentially to control the terahertz amplitude modulation, obtaining a depth of up to 68% at a laser irradiance of 1.5 W/cm 2 . In addition, we compared the performances from three types of perovskite devices fabricated via different solution processing methods and suggested a stable and highly efficient THz switch based on a one-step processing. By this we demonstrated the possibility of perovskites as THz wave switching devices in addition to photovoltaics.

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