Tall-barrier terahertz quantum cascade lasers
Name
Hu_Tall-barrier.pdf
Size
954.84 KB
Format
Adobe PDF
Checksum (MD5)
78769cb38c409a428355df493e40c30c
Author(s)
Hu, Qing
Reno, John L.
Chan, Chun Wang Ivan
Date Issued
October 2013
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Chan, Chun Wang I., Qing Hu, and John L. Reno. “Tall-Barrier Terahertz Quantum Cascade Lasers.” Appl. Phys. Lett. 103, no. 15 (2013): 151117. © 2013 AIP Publishing LLC
Version
Final published version
Abstract
A terahertz quantum cascade laser is presented in which selectively placed pure AlAs barriers are used to reduce parasitic leakage currents to the conduction band continuum. The design is demonstrated to have improved temperature performance over a regrowth of the current T [subscript max] ∼ 200 K record holder (181 K vs. 175 K). Strangely, it fails to lase below ∼70 K, which we attribute to negative differential resistance (NDR) prior to threshold. A subsequent design using only AlAs barriers failed to lase, the reason for which we posit to be either early NDR or excessive interface roughness scattering.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/1.4824878
