Short-period superlattices: is thinner better?

G. J. Brown; H. J. Haugan; F. Szmulowicz; K. Mahalingam; S. R. Munshi; B. Ullrich; S. Houston

doi:10.1117/12.666593

28 February 2006 Short-period superlattices: is thinner better?

G. J. Brown, H. J. Haugan, F. Szmulowicz, K. Mahalingam, S. R. Munshi, B. Ullrich, S. Houston

Proceedings Volume 6127, Quantum Sensing and Nanophotonic Devices III; 61271I (2006) https://doi.org/10.1117/12.666593
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

For type-II superlattices with spatially indirect optical transitions across the band gap, short-period superlattices are often employed. The oscillator strength of intraband transitions, from holes states confined in one layer to electron states confined in a neighboring layer, are enhanced by increasing the wave function overlap of these states through reduced superlattice period. However, there are limits to accurately controlling an epitaxially grown semiconductor superlattice structure as the number of monolayers in each layer is decreased. For InAs/GaSb type superlattices, periods of 40Å or less are relevant to mid-infrared detection. Characterization and modeling results for a series of InAs/GaSb superlattices with periods ranging 50Å to 20Å will be presented. These results explore the break point between when thinner is better and when reducing the period no longer optimizes the superlattice optical performance.

Citation Download Citation

G. J. Brown, H. J. Haugan, F. Szmulowicz, K. Mahalingam, S. R. Munshi, B. Ullrich, and S. Houston "Short-period superlattices: is thinner better?", Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61271I (28 February 2006); https://doi.org/10.1117/12.666593

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