Femtosecond laser activation of surface reactions

Richard J. Finlay; Shrenik M. Deliwala; Jay R. Goldman; Tsing-Hua Her; Walter D. Mieher; C. Wu; Eric Mazur

doi:10.1117/12.221499

25 September 1995 Femtosecond laser activation of surface reactions

Richard J. Finlay, Shrenik M. Deliwala, Jay R. Goldman, Tsing-Hua Her, Walter D. Mieher, C. Wu, Eric Mazur

Proceedings Volume 2547, Laser Techniques for Surface Science II; (1995) https://doi.org/10.1117/12.221499
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Laser induced formation of CO₂ and desorption of O₂ are initiated with femtosecond and picosecond laser excitation of a Pt(111) surface prepared with coadsorbed CO and O₂ at 90 K. The nonlinear fluence dependent reaction yields were measured for 267, 400, and 800 nm wavelengths, and for pulse durations from 80 fs to 3.6 ps. Two-pulse correlation experiments measuring total O₂ desorption yield versus time delay between 80 fs pulses show a 0.9 ps HWHM central peak and a slower 0.1 ns time-scale. At 267 nm the relative yields of O₂ and CO₂ are found to depend on fluence. Comparison of results at different wavelengths and pulsewidths shows that nonthermalized surface electrons play a role in the laser-induced surface chemistry.

Citation Download Citation

Richard J. Finlay, Shrenik M. Deliwala, Jay R. Goldman, Tsing-Hua Her, Walter D. Mieher, C. Wu, and Eric Mazur "Femtosecond laser activation of surface reactions", Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); https://doi.org/10.1117/12.221499

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