Open AccessStudy of 2.9 THz quantum cascade laser based on bound-to-continuum transition
Author(s) -
Wan Wen-Jian,
Rong Yin,
Zhongxin Tan,
Feng Wang,
Han Ying-Jun,
Juncheng Cao
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.210701
Subject(s) - terahertz radiation , molecular beam epitaxy , materials science , cascade , laser , quantum cascade laser , optoelectronics , continuous wave , photomixing , optics , far infrared laser , physics , terahertz metamaterials , epitaxy , chemistry , chromatography , layer (electronics) , composite material
The material of GaAs/AlGaAs bound-to-continuum terahertz quantum-cascade laser (THz QCL) was grown by gas source molecular beam epitaxy. A THz QCL device was fabricated with semi-insulating surface-plasmon waveguide. Its spectrum and light intensity-current-voltage characteristics were studied. The device emits about 2.95 THz, and yields a maximum temperature of 67 K in pulse mode. In continuous-wave mode, it displays a threshold current density of 230 A/cm2 at 9 K with maximum emitted power of 1.2 mW and lases up to 30 K.