Temperature effects in terahertz step well quantum cascade structures with diagonal optical transitions

Will Freeman; Gamani Karunasiri

doi:10.1117/12.894223

7 September 2011 Temperature effects in terahertz step well quantum cascade structures with diagonal optical transitions

Will Freeman, Gamani Karunasiri

Author Affiliations +

Proceedings Volume 8119, Terahertz Emitters, Receivers, and Applications II; 81190A (2011) https://doi.org/10.1117/12.894223
Event: SPIE Photonic Devices + Applications, 2011, San Diego, California, United States

Abstract

Temperature effects in terahertz (THz) step well quantum cascade (QC) structures are investigated. Step well QC structures with diagonal optical transitions that use fast intrawell electron-longitudinal optical (LO) phonon scattering for depopulation are considered. A density matrix method is used to model the electron transport coherence and is incorporated into the Monte Carlo simulations of these structures. A phenomenological dephasing time is also included. The influence of the lattice temperature on the population inversion is modeled and the effects due to gain spectral broadening are also considered. Optical gain greater than typical waveguide resonator thresholds are estimated out to T ~ 200 K.

Citation Download Citation

Will Freeman and Gamani Karunasiri "Temperature effects in terahertz step well quantum cascade structures with diagonal optical transitions", Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190A (7 September 2011); https://doi.org/10.1117/12.894223

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available