Lasing and laser-induced motion of zinc oxide nano-crystals irradiated by ultraviolet laser beam

K. Okazaki; D. Nakamura; M. Higashihata; T. Okada

doi:10.1117/12.875793

21 February 2011 Lasing and laser-induced motion of zinc oxide nano-crystals irradiated by ultraviolet laser beam

K. Okazaki, D. Nakamura, M. Higashihata, T. Okada

Proceedings Volume 7922, Synthesis and Photonics of Nanoscale Materials VIII; 79220M (2011) https://doi.org/10.1117/12.875793
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

The lasing characteristics and the alignment methods of ZnO nanocrystals were investigated for an application to ultraviolet (UV) laser diode (LD). ZnO nanowires and nanosheets were synthesized on a silicon substrate by a CVD method or nanoparticle assisted pulsed-laser deposition (NAPLD), and then those ZnO nanocrystals were examined by a photoluminescence (PL) method with a third-harmonic Nd:YAG laser (355 nm, 5 ns). The observed emission spectra showed the obvious lasing characteristics having mode structure and a threshold for lasing. The threshold power density of a ZnO nanowire and a nanosheet were measured to be 100 kW/cm² and 5 kW/cm², respectively. Furthermore, the threshold power was calculated to be 8.4 mW for a ZnO nanowire and 2.5 mW for a ZnO nanosheet. Then the oscillation mechanisms were discussed on those ZnO nanocrystals. We also observed the laser-induced motion (LIM) of ZnO nanocrystals when they were excited by ultraviolet laser beam.

Citation Download Citation

K. Okazaki, D. Nakamura, M. Higashihata, and T. Okada "Lasing and laser-induced motion of zinc oxide nano-crystals irradiated by ultraviolet laser beam", Proc. SPIE 7922, Synthesis and Photonics of Nanoscale Materials VIII, 79220M (21 February 2011); https://doi.org/10.1117/12.875793

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