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Optical element, and optical device and terahertz time-domain spectroscopic apparatus including the same
Optical element, and optical device and terahertz time-domain spectroscopic apparatus including the same
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机译:光学元件,光学装置以及包括其的太赫兹时域光谱装置
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摘要
An optical element includes a semiconductor layer having an energy band gap larger than a photon energy of light, and a plurality of electrodes in electrical contact with the semiconductor layer. At least one of the electrodes forms a Schottky junction between the electrode and the semiconductor layer; the Schottky junction has a barrier height smaller than the photon energy of the light. At least part of a junction surface between the electrode that forms the Schottky junction and the semiconductor layer includes a light irradiation surface arranged to be irradiated with the light from a surface of the semiconductor layer without the electrodes, and a portion of a coupling structure arranged to be coupled to a terahertz wave that is generated or detected through the irradiation with the light.
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