Design and Characterization of Quantum-Cascade Lasers

From SIMS experiment, MBE-grown QCL structure exhibit high controllability and uniformity. The position of the PL peak is very close to the location predicted by our model. THz radiation from an MBE grown bound-to-continuum QCL is observed with the lasing wavelength of 104 mum. The light-current-voltage characteristics as well as the lasing spectrum are measured at different temperature. The characteristic temperature is extracted to be 144 K, while the quantum efficiency is found to be around 8-13% with the tunability of 2 nm/K. Both the lasing energy transition and the threshold current density are in good agreement with our calculation.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical and Computer Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Lerttamrab, Maytee

Contributors dc:contributor

• Chuang, Shun-Lien

• Engineering, Electronics and Electrical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3223649

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/80959