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Title: A search for spin-polarized photoemission from GaAs using light with orbital angular momentum

Abstract

Laser light with photon energy near the bandgap of GaAs and with different amounts of orbital angular momentum was used to produce photoemission from unstrained GaAs. The degree of electron spin polarization was measured using a micro-Mott polarimeter and found to be consistent with zero with an upper limit of ~3% for light with up to ±5{bar h} of orbital angular momentum. In contrast, the degree of spin polarization was 32.32 ± 1.35% using circularly-polarized laser light at the same wavelength, which is typical of bulk GaAs.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1062034
Report Number(s):
JLAB-ACC-12-1620; DOE/OR/23177-2477
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
PHYSICAL REVIEW B
Additional Journal Information:
Journal Volume: 87; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Nathan Clayburn, James McCarter, Joan Dreiling, Bernard Poelker, Dominic Ryan, Timothy Gay. A search for spin-polarized photoemission from GaAs using light with orbital angular momentum. United States: N. p., 2013. Web. doi:10.1103/PhysRevB.87.035204.
Nathan Clayburn, James McCarter, Joan Dreiling, Bernard Poelker, Dominic Ryan, Timothy Gay. A search for spin-polarized photoemission from GaAs using light with orbital angular momentum. United States. https://doi.org/10.1103/PhysRevB.87.035204
Nathan Clayburn, James McCarter, Joan Dreiling, Bernard Poelker, Dominic Ryan, Timothy Gay. Tue . "A search for spin-polarized photoemission from GaAs using light with orbital angular momentum". United States. https://doi.org/10.1103/PhysRevB.87.035204.
@article{osti_1062034,
title = {A search for spin-polarized photoemission from GaAs using light with orbital angular momentum},
author = {Nathan Clayburn, James McCarter, Joan Dreiling, Bernard Poelker, Dominic Ryan, Timothy Gay},
abstractNote = {Laser light with photon energy near the bandgap of GaAs and with different amounts of orbital angular momentum was used to produce photoemission from unstrained GaAs. The degree of electron spin polarization was measured using a micro-Mott polarimeter and found to be consistent with zero with an upper limit of ~3% for light with up to ±5{bar h} of orbital angular momentum. In contrast, the degree of spin polarization was 32.32 ± 1.35% using circularly-polarized laser light at the same wavelength, which is typical of bulk GaAs.},
doi = {10.1103/PhysRevB.87.035204},
url = {https://www.osti.gov/biblio/1062034}, journal = {PHYSICAL REVIEW B},
number = 3,
volume = 87,
place = {United States},
year = {2013},
month = {1}
}