Antenna-boosted mixing of terahertz and near-infrared radiation
- Physics Department, University of California, Santa Barbara, California 93106 (United States)
- Materials Department, University of California, Santa Barbara, California 93106 (United States)
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.
- OSTI ID:
- 22311016
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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