Carrier localization and enhanced spontaneous emission due to plasma nanosheath formation in polar nanostructured materials

Spilios Riyopoulos; J. Cabalu; T. Moustakas

doi:10.1117/12.684935

12 October 2006 Carrier localization and enhanced spontaneous emission due to plasma nanosheath formation in polar nanostructured materials

Spilios Riyopoulos, J. Cabalu, T. Moustakas

Author Affiliations +

Proceedings Volume 6368, Optoelectronic Devices: Physics, Fabrication, and Application III; 63680M (2006) https://doi.org/10.1117/12.684935
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

The longitudinal component of the polarization field inherent in polar materials, combined with constrained carrier motion along the quantum wells, causes formation of equilibrium plasma nano-sheaths at intersections of quantum wells. The induced short range (nm) potentials of peak voltages much larger than the thermal carrier energy cause wavefunction localization, which further reduces the dimensionality of the carrier behavior. The associated energy band-bending causes enhanced carrier accumulation at quantum wedges and quantum tips formed by intersecting quantum wells. In addition, the total carrier number over the QW length increases, manifesting spontaneous intrinsic pumping due to polarization. As a result, the spontaneous emission is localized at quantum wedges, and the total emission exceeds that from a flat quantum well of similar parameters, as experimentally observed. The sheath potentials are sufficiently high for 1-D or 0-D carrier localization at quantum wedges and quantum tips.

Citation Download Citation

Spilios Riyopoulos, J. Cabalu, and T. Moustakas "Carrier localization and enhanced spontaneous emission due to plasma nanosheath formation in polar nanostructured materials", Proc. SPIE 6368, Optoelectronic Devices: Physics, Fabrication, and Application III, 63680M (12 October 2006); https://doi.org/10.1117/12.684935

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