Random lasing in nanocrystalline ZnO powders

Heinz Kalt; Janos Sartor; Felix Eilers; Johannes Fallert; Daniel Schneider; Roman J. B. Dietz; Claus Klingshirn

doi:10.1117/12.847329

25 February 2010 Random lasing in nanocrystalline ZnO powders

Heinz Kalt, Janos Sartor, Felix Eilers, Johannes Fallert, Daniel Schneider, Roman J. B. Dietz, Claus Klingshirn

Proceedings Volume 7597, Physics and Simulation of Optoelectronic Devices XVIII; 759712 (2010) https://doi.org/10.1117/12.847329
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

We review the random-lasing properties of nanocrystalline ZnO powders. The lowest threshold for lasing occurs for average particle diameters of about 260nm. Reproducible lasing features are achieved for reduced ensemble sizes. Spatially resolved luminescence spectroscopy is used to probe directly the degree of localization of random laser modes. We find that strongly confined and extended modes can coexist in the same spatial area. However, localized modes appear for small optical gain while extended modes are only supported in the presence of large optical gain, as is expected from theory. Uniform line spacing is found in the case of extended random laser modes resulting from strong modal interactions.

Citation Download Citation

Heinz Kalt, Janos Sartor, Felix Eilers, Johannes Fallert, Daniel Schneider, Roman J. B. Dietz, and Claus Klingshirn "Random lasing in nanocrystalline ZnO powders", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759712 (25 February 2010); https://doi.org/10.1117/12.847329

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