Spatiotemporal imaging of weakly excited femtosecond SPP based on space-dependent-quantum channel effect

Zhenlong Zhao; Boyu Ji; Xiaowei Song; Peng Lang; Yulu Qin; Jingquan Lin

doi:10.1117/12.2600777

9 October 2021 Spatiotemporal imaging of weakly excited femtosecond SPP based on space-dependent-quantum channel effect

Zhenlong Zhao, Boyu Ji, Xiaowei Song, Peng Lang, Yulu Qin, Jingquan Lin

Author Affiliations +

Proceedings Volume 11904, Plasmonics VI; 1190412 (2021) https://doi.org/10.1117/12.2600777
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

Accurately capturing the spatiotemporal information of surface plasmon polaritons (SPPs) is the basis for expanding SPPs applications. We record time-resolved nonlinear photoemission electron microscopy (TR-PEEM) images of weakly excited femtosecond SPPs launched from a rectangular trench milled into a flat silver film. Experimental results show that the overall photoelectron yield is greatly enhanced (typically 6-fold enhancement with the comparison of that without 400nm pulse) in this configuration. The spatiotemporal evolution of SPP can be easily investigated with its carrier wavelength, group velocityand phase velocity. The improvement of photoemission yield is interpreted by the quantum pathway for two-color with changing the nonlinear for photoemission. It is found that the contrast between bright and dark fringes of SPPs is significantly improved compared to the single-color scheme due to the improvement of quantum pathway channels for photoemission. These findings complete the underlying physics of two-color PEEM optimized SPP spatiotemporal imaging.

Citation Download Citation

Zhenlong Zhao, Boyu Ji, Xiaowei Song, Peng Lang, Yulu Qin, and Jingquan Lin "Spatiotemporal imaging of weakly excited femtosecond SPP based on space-dependent-quantum channel effect", Proc. SPIE 11904, Plasmonics VI, 1190412 (9 October 2021); https://doi.org/10.1117/12.2600777

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