Open AccessHigh Frequency Mid-Infrared Quantum Cascade Laser Integrated With Grounded Coplanar Waveguide Transmission Line
Author(s) -
Xu Gao,
Ke Yang,
Yixuan Zhu,
Kai Guo,
Shenqiang Zhai,
Ning Zhuo,
Yuan Li,
Jinchuan Zhang,
Lijun Wang,
Shuman Liu,
Fengqi Liu,
Zhipeng Wei,
Xiaohua Wang,
Junqi Liu
Publication year - 2024
Publication title -
ieee electron device letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.337
H-Index - 154
eISSN - 1558-0563
pISSN - 0741-3106
DOI - 10.1109/led.2024.3368411
Subject(s) - engineered materials, dielectrics and plasmas , components, circuits, devices and systems
In this letter, we proposed a kind of high-bandwidth directly modulated quantum cascade laser (QCL) at $\sim 8.5~\mu \text{m}$ by optoelectronic fusion integration technology. Multi-physics collaborative buried heterojunction (BH) QCL with a tri-terminal coplanar electrode is monolithically integrated with a grounded coplanar waveguide (GCPW) transmission line. Through precise control of each parasitic parameter, has enabled our 2-mm-long and 7.8- $\mu \text{m}$ -wide QCL to achieve an impressive −3 dB electrical modulation bandwidth of 16.5 GHz in a microwave rectification scheme. Simultaneously, it maintains a continuous wave (CW) output power of 91 mW at room temperature. Additionally, for a 2-mm-long and 11.5- $\mu \text{m}$ -wide QCL, we reach a −3 dB electrical modulation bandwidth up to 23.9 GHz and a cutoff frequency exceeding 30 GHz. These promising results indicate that the device has the potential to be a valuable candidate for applications in mid-wave infrared (MWIR) free-space optical communication (FSOC), among others.