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Title: Nanoantenna-induced current enhancement of nano-sized metal/oxide interfaces

In this paper, nanoantenna resonance is demonstrated on nano-sized gold/SrTiO 3 interfaces. This resonance arising from the collective oscillation of free electrons results in photocurrent current enhancement, facilitated by the built-in electric field at the Schottky interface. This current enhancement around the nanoantenna resonance peak can be attributed to hot electron generation and extraction. The photocurrent dependence on incident wavelength and power was characterized. Finally, applying external bias, improved the current enhancement by orders of magnitude.
Authors:
 [1] ; ORCiD logo [1] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
  2. Huazhong Univ. of Science and Technology, Wuhan (China). School of Optics and Electronic Information
  3. Univ. of California, San Diego, CA (United States). Dept. of NanoEngineering
Publication Date:
Grant/Contract Number:
FG02-00ER45813; DMR08-32802; DMR11-20901
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; antennas; gold; photoelectric conversion; carrier generation; hot carriers; plasmons; Schottky barriers; blue shift; electron beam deposition
OSTI Identifier:
1465962
Alternate Identifier(s):
OSTI ID: 1361761