Observation of two-photon photoemission from cesium telluride photocathodes excited by a near-infrared laser
Abstract
We explore nonlinear photoemission in cesium telluride (Cs$$_2$$Te) photocathodes where an ultrashort ($$\sim 100$$ fs full width at half max) 800-nm infrared laser is used as the drive-laser in lieu of the typical $$\sim 266$$-nm ultraviolet laser. An important figure of merit for photocathodes, the quantum efficiency, we define here for nonlinear photoemission processes in order to compare with linear photoemission. The charge against drive-laser (infrared) energy is studied for different laser energy and intensity values and cross-compared with previously performed similar studies on copper [P. Musumeci et al., \emph{Phys. Rev. Lett.}, \textbf{104}, 084801 (2010)], a metallic photocathode. We particularly observe two-photon photoemission in Cs$$_2$$Te using the infrared laser in contrast to the anticipated three-photon process as observed for metallic photocathodes.
- Authors:
-
[1];
- Northern Illinois Univ., DeKalb, IL (United States)
- Northern Illinois Univ., DeKalb, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1623375
- Alternate Identifier(s):
- OSTI ID: 1348275
- Report Number(s):
- FERMILAB-PUB-16-559-AD-APC; arXiv:1612.02956
Journal ID: ISSN 0003-6951; oai:inspirehep.net:1502649; TRN: US2106867
- Grant/Contract Number:
- AC02-07CH11359; FG02-08ER41532
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 110; Journal Issue: 9; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Panuganti, H., and Piot, P. Observation of two-photon photoemission from cesium telluride photocathodes excited by a near-infrared laser. United States: N. p., 2017.
Web. doi:10.1063/1.4977884.
Panuganti, H., & Piot, P. Observation of two-photon photoemission from cesium telluride photocathodes excited by a near-infrared laser. United States. https://doi.org/10.1063/1.4977884
Panuganti, H., and Piot, P. Thu .
"Observation of two-photon photoemission from cesium telluride photocathodes excited by a near-infrared laser". United States. https://doi.org/10.1063/1.4977884. https://www.osti.gov/servlets/purl/1623375.
@article{osti_1623375,
title = {Observation of two-photon photoemission from cesium telluride photocathodes excited by a near-infrared laser},
author = {Panuganti, H. and Piot, P.},
abstractNote = {We explore nonlinear photoemission in cesium telluride (Cs$_2$Te) photocathodes where an ultrashort ($\sim 100$ fs full width at half max) 800-nm infrared laser is used as the drive-laser in lieu of the typical $\sim 266$-nm ultraviolet laser. An important figure of merit for photocathodes, the quantum efficiency, we define here for nonlinear photoemission processes in order to compare with linear photoemission. The charge against drive-laser (infrared) energy is studied for different laser energy and intensity values and cross-compared with previously performed similar studies on copper [P. Musumeci et al., \emph{Phys. Rev. Lett.}, \textbf{104}, 084801 (2010)], a metallic photocathode. We particularly observe two-photon photoemission in Cs$_2$Te using the infrared laser in contrast to the anticipated three-photon process as observed for metallic photocathodes.},
doi = {10.1063/1.4977884},
journal = {Applied Physics Letters},
number = 9,
volume = 110,
place = {United States},
year = {Thu Mar 02 00:00:00 EST 2017},
month = {Thu Mar 02 00:00:00 EST 2017}
}
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Works referencing / citing this record:
First-principles many-body study of the electronic and optical properties of CsK2Sb, a semiconducting material for ultra-bright electron sources
text, January 2018
- Cocchi, Caterina; Mistry, Sonal; Schmeißer, Martin
- Humboldt-Universität zu Berlin
First-principles many-body study of the electronic and optical properties of CsK2Sb, a semiconducting material for ultra-bright electron sources
text, January 2018
- Cocchi, Caterina; Mistry, Sonal; Schmeisser, Martin
- arXiv