Abstract

We report the in situ formation of nearly periodic microstructures of different grain size by a 266-nm, 10-psec, 10-Hz laser beam with different energies. Photoelectric emission from these surfaces exhibits enhancement of photoelectric quantum efficiency caused by the changes in the work function and optical absorption. Because of the microstructures, the surface field is also enhanced over the applied field, leading to field-assisted photoemission. For the voltages applied in these experiments, the electron yield increases nearly linearly with the applied field, owing to the Schottky effect. A least-squares fit of the data to the theoretical expression for emission under the Schottky effect yields surface field enhancements of 8–15 over the applied field.

© 1991 Optical Society of America

Spatial- and energy-resolved photoemission electron from plasmonic nanoparticles in multiphoton regime

Peng Lang, Xiaowei Song, Boyu Ji, Haiyan Tao, Yinping Dou, Xun Gao, Zuoqiang Hao, and Jingquan Lin
Opt. Express 27(5) 6878-6891 (2019)

Field-enhancement of photoemission from cesium telluride

C. I. Coleman
Appl. Opt. 17(11) 1789-1796 (1978)

Two-color photoemission produced by femtosecond laser pulses on copper

P. Muggli, R. Brogle, and C. Joshi
J. Opt. Soc. Am. B 12(4) 553-558 (1995)

External Field Enhanced Photoemission in Silver–Cesium–Oxygen Photocathodes

E. G. Burroughs
Appl. Opt. 8(2) 261-265 (1969)

Plasmonic nano-arrays for enhanced photoemission and photodetection

Shiva Piltan and Dan Sievenpiper
J. Opt. Soc. Am. B 35(2) 208-213 (2018)