Efficient terahertz detection in a sheet cavity using a nonlinear optical parametric process

Kyosuke Saito; Tadao Tanabe; Yutaka Oyama

doi:10.1364/AO.54.005475

Efficient terahertz detection in a sheet cavity using a nonlinear optical parametric process

Kyosuke Saito, Tadao Tanabe, Yutaka Oyama

Research output: Contribution to journal › Article › peer-review

Abstract

We designed and simulated a GaP-based sheet cavity structure for room-temperature THz wave detection via a nonlinear optical (NLO) parametric process, using photonic conversion from THz frequencies to the optical domain. The sheet cavity structure consisted of a GaP rectangular waveguide for THz waves. Pump enhancement in the cavity and strong confinement of the THz wave in the waveguide resulted in a high power conversion efficiency of 1% (detection at 5 THz). The noise equivalent power for THz wave detection using an optical single-photon detector was estimated to be in the order of a few fW Hz^-1/2, which was higher than that obtained using room-temperature bolometers, field-effect transistors, and other NLO processes.

Original language	English
Pages (from-to)	5475-5480
Number of pages	6
Journal	Applied Optics
Volume	54
Issue number	17
DOIs	https://doi.org/10.1364/AO.54.005475
Publication status	Published - 2015 Jun 10
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.54.005475

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abstract = "We designed and simulated a GaP-based sheet cavity structure for room-temperature THz wave detection via a nonlinear optical (NLO) parametric process, using photonic conversion from THz frequencies to the optical domain. The sheet cavity structure consisted of a GaP rectangular waveguide for THz waves. Pump enhancement in the cavity and strong confinement of the THz wave in the waveguide resulted in a high power conversion efficiency of 1% (detection at 5 THz). The noise equivalent power for THz wave detection using an optical single-photon detector was estimated to be in the order of a few fW Hz-1/2, which was higher than that obtained using room-temperature bolometers, field-effect transistors, and other NLO processes.",

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AB - We designed and simulated a GaP-based sheet cavity structure for room-temperature THz wave detection via a nonlinear optical (NLO) parametric process, using photonic conversion from THz frequencies to the optical domain. The sheet cavity structure consisted of a GaP rectangular waveguide for THz waves. Pump enhancement in the cavity and strong confinement of the THz wave in the waveguide resulted in a high power conversion efficiency of 1% (detection at 5 THz). The noise equivalent power for THz wave detection using an optical single-photon detector was estimated to be in the order of a few fW Hz-1/2, which was higher than that obtained using room-temperature bolometers, field-effect transistors, and other NLO processes.

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Efficient terahertz detection in a sheet cavity using a nonlinear optical parametric process

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