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Title: Antenna-boosted mixing of terahertz and near-infrared radiation

Using moderate terahertz intensities of approximately 20 kW/cm{sup 2} near 0.6 THz, together with simple antennas, we have observed up to 12 sidebands on a near IR laser. The high-order sidebands were generated at room temperature in a membrane containing GaAs/AlGaAs quantum wells. The antennas were rectangular apertures ∼0.2 mm long in a gold film evaporated onto the membrane. Comparing the intensities required to generate comparable sideband spectra with and without antennas, we estimate the local terahertz field was enhanced by a factor of 5 ± 1, in agreement with finite difference time domain calculations.
Authors:
;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Physics Department, University of California, Santa Barbara, California 93106 (United States)
  2. (United States)
  3. (Switzerland)
  4. Materials Department, University of California, Santa Barbara, California 93106 (United States)
Publication Date:
OSTI Identifier:
22311016
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 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; ALUMINIUM COMPOUNDS; ANTENNAS; APERTURES; COMPUTERIZED SIMULATION; FILMS; GALLIUM ARSENIDES; GOLD; MEMBRANES; NEAR INFRARED RADIATION; QUANTUM WELLS; SPECTRA; TEMPERATURE RANGE 0273-0400 K