Double-metal waveguide terahertz difference-frequency generation quantum cascade lasers with surface grating outcouplers

Jae Hyun Kim; Seungyong Jung; Yifan Jiang; Kazuue Fujita; Masahiro Hitaka; Akio Ito; Tadataka Edamura; Mikhail A. Belkin

doi:10.1063/1.5043095

Double-metal waveguide terahertz difference-frequency generation quantum cascade lasers with surface grating outcouplers

Jae Hyun Kim, Seungyong Jung, Yifan Jiang, Kazuue Fujita, Masahiro Hitaka, Akio Ito, Tadataka Edamura, Mikhail A. Belkin

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

15 Scopus citations

Abstract

We report terahertz quantum cascade laser (QCL) sources based on intra-cavity difference-frequency generation processed into double-metal waveguides with surface-grating outcouplers. This configuration enables high confinement of the terahertz mode in the device active region and efficient surface extraction of terahertz radiation along the entire length of the waveguide. The devices operate at room temperature at 1.9 THz and produce over 110 μW of peak power output with the mid-infrared-to-terahertz conversion of 150 μW/W². The results represent at least a factor of 2 improvement in the performance compared to the best Cherenkov difference-frequency generation QCL devices operating below 2 THz.

Original language	English
Article number	161102
Journal	Applied Physics Letters
Volume	113
Issue number	16
DOIs	https://doi.org/10.1063/1.5043095
State	Published - 15 Oct 2018
Externally published	Yes

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title = "Double-metal waveguide terahertz difference-frequency generation quantum cascade lasers with surface grating outcouplers",

abstract = "We report terahertz quantum cascade laser (QCL) sources based on intra-cavity difference-frequency generation processed into double-metal waveguides with surface-grating outcouplers. This configuration enables high confinement of the terahertz mode in the device active region and efficient surface extraction of terahertz radiation along the entire length of the waveguide. The devices operate at room temperature at 1.9 THz and produce over 110 μW of peak power output with the mid-infrared-to-terahertz conversion of 150 μW/W2. The results represent at least a factor of 2 improvement in the performance compared to the best Cherenkov difference-frequency generation QCL devices operating below 2 THz.",

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T1 - Double-metal waveguide terahertz difference-frequency generation quantum cascade lasers with surface grating outcouplers

AU - Kim, Jae Hyun

AU - Jung, Seungyong

AU - Jiang, Yifan

AU - Fujita, Kazuue

AU - Hitaka, Masahiro

AU - Ito, Akio

AU - Edamura, Tadataka

AU - Belkin, Mikhail A.

PY - 2018/10/15

Y1 - 2018/10/15

N2 - We report terahertz quantum cascade laser (QCL) sources based on intra-cavity difference-frequency generation processed into double-metal waveguides with surface-grating outcouplers. This configuration enables high confinement of the terahertz mode in the device active region and efficient surface extraction of terahertz radiation along the entire length of the waveguide. The devices operate at room temperature at 1.9 THz and produce over 110 μW of peak power output with the mid-infrared-to-terahertz conversion of 150 μW/W2. The results represent at least a factor of 2 improvement in the performance compared to the best Cherenkov difference-frequency generation QCL devices operating below 2 THz.

AB - We report terahertz quantum cascade laser (QCL) sources based on intra-cavity difference-frequency generation processed into double-metal waveguides with surface-grating outcouplers. This configuration enables high confinement of the terahertz mode in the device active region and efficient surface extraction of terahertz radiation along the entire length of the waveguide. The devices operate at room temperature at 1.9 THz and produce over 110 μW of peak power output with the mid-infrared-to-terahertz conversion of 150 μW/W2. The results represent at least a factor of 2 improvement in the performance compared to the best Cherenkov difference-frequency generation QCL devices operating below 2 THz.

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Double-metal waveguide terahertz difference-frequency generation quantum cascade lasers with surface grating outcouplers

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