Single nanowire lasers: Toward a continuously tunable design

PHYS 209

Robert M. Onorato, ronorato@berkeley.edu1, Justin C. Johnson2, Peidong Yang, p_yang@berkeley.edu3, and Richard J. Saykally, saykally@berkeley.edu1. (1) Department of Chemistry, University of California, Berkeley; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-1460, (2) Center for Basic Sciences, National Renewable Energy Laboratory, Golden, CO 80401, (3) Department of Chemistry, University of California, Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
Our groups have synthesized and characterized optically-pumped UV lasers comprising single nanowires of both ZnO and GaN. Recent efforts have focused on the development of such lasers with high nonlinear index, such that sum and difference frequency generation can be effected with sufficiently high efficiency to produce usable frequency synthesis and perhaps optical gain. We have characterized the second-order wave mixing nature of KNbO3 nanowires throughout the visible region as well as the capability of these nanowires to waveguide the light generated at twice the trapping frequency, which enables their use as a near-field probe.
 

Spectroscopy, Chemistry, and Imaging through Nanophotonics
8:00 AM-12:00 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 345, Oral

Division of Physical Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008