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Title: Photoconductive response of a single Au nanorod coupled to LaAlO{sub 3}/SrTiO{sub 3} nanowires

Terahertz (THz) spectroscopy is an important tool that provides resonant access to free carrier motion, molecular rotation, lattice vibrations, excitonic, spin, and other degrees of freedom. Current methods using THz radiation suffer from limits due to diffraction or low-sensitivity, preventing application at the scale of single nanoscale objects. Here, we present coupling between plasmonic degrees of freedom in a single gold nanorod and broadband THz emission generated from a proximal LaAlO{sub 3}/SrTiO{sub 3} nanostructure. A strong enhancement of THz emission is measured for incident radiation that is linearly polarized along the long axis of the nanorod. This demonstration paves the way for the investigation of near-field plasmonic coupling in a variety of molecular-scale systems.
Authors:
; ;  [1] ; ; ; ;  [2] ; ;  [1] ;  [3]
  1. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh 15260 (United States)
  2. Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22402482
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINATES; DEGREES OF FREEDOM; FAR INFRARED RADIATION; GOLD; LANTHANUM COMPOUNDS; LATTICE VIBRATIONS; NANOSTRUCTURES; PHOTOCONDUCTIVITY; STRONTIUM TITANATES; THZ RANGE