Open AccessQuantum cascade lasers with Y_2O_3 insulation layer operating at 81 µm
Author(s) -
JoonHyun Kang,
Hyun-Duk Yang,
Beom Soo Joo,
Joon-Suh Park,
Song-Ee Lee,
Shinyoung Jeong,
Jihoon Kyhm,
Mei Han,
Jin Dong Song,
Il Ki Han
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.019561
Subject(s) - materials science , attenuation coefficient , optics , lasing threshold , laser , cascade , optoelectronics , wavelength , absorption (acoustics) , quantum cascade laser , layer (electronics) , physics , composite material , chemistry , chromatography
SiO 2 is a commonly used insulation layer for QCLs but has high absorption peak around 8 to 10 µm. Instead of SiO 2 , we used Y 2 O 3 as an insulation layer for DC-QCL and successfully demonstrated lasing operation at the wavelength around 8.1 µm. We also showed 2D numerical analysis on the absorption coefficient of our DC-QCL structure with various parameters such as insulating materials, waveguide width, and mesa angle.