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Ultrabroadband photosensitivity from visible to terahertz at room temperature.

ABSTRACT: Charge density wave (CDW) is one of the most fundamental quantum phenomena in solids. Different from ordinary metals in which only single-particle excitations exist, CDW also has collective excitations and can carry electric current in a collective fashion. Manipulating this collective condensation for applications has long been a goal in the condensed matter and materials community. We show that the CDW system of 1T-TaS2 is highly sensitive to light directly from visible down to terahertz, with current responsivities on the order of ~1 AW-1 at room temperature. Our findings open a new avenue for realizing uncooled, ultrabroadband, and sensitive photoelectronics continuously down to the terahertz spectral range.

SUBMITTER: Wu D

PROVIDER: S-EPMC6070364 | biostudies-other | 2018 Aug

REPOSITORIES: biostudies-other

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Ultrabroadband photosensitivity from visible to terahertz at room temperature.

Wu Dong D Ma Yongchang Y Niu Yingying Y Liu Qiaomei Q Dong Tao T Zhang Sijie S Niu Jiasen J Zhou Huibin H Wei Jian J Wang Yingxin Y Zhao Ziran Z Wang Nanlin N

Science advances 20180803 8

Charge density wave (CDW) is one of the most fundamental quantum phenomena in solids. Different from ordinary metals in which only single-particle excitations exist, CDW also has collective excitations and can carry electric current in a collective fashion. Manipulating this collective condensation for applications has long been a goal in the condensed matter and materials community. We show that the CDW system of 1T-TaS<sub>2</sub> is highly sensitive to light directly from visible down to tera ...[more]

PMID: 30083597

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