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19 April 2017 Broadband terahertz generation from metamaterials and their hybrid quantum structures (Conference Presentation)
Jigang Wang
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Proceedings Volume 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X; 1010316 (2017) https://doi.org/10.1117/12.2256804
Event: SPIE OPTO, 2017, San Francisco, California, United States
Abstract
The terahertz spectral regime, ranging from about 0.1–15 THz, is one of the least explored yet most technologically transformative spectral regions. One current challenge is to develop efficient and compact terahertz emitters/detectors with a broadband and gapless spectrum that can be tailored for various pump photon energies. A particularly essential and topical question is how to create nonlinear broadband terahertz devices using deeply subwavelength nanoscale meta-atom resonators. Here we demonstrate efficient single-cycle broadband THz generation, ranging from about 0.1–4 THz, in two model hybrid quantum nanostructures: (1) a thin layer of split-ring resonators (SRRs) with few tens of nanometers thickness by pumping at the telecommunications wavelength of 200 THz; (2) SRRs coupled to intersubband transitions in quantum wells pumping at 30 THz. We also reveal a giant sheet nonlinear susceptibility that far exceeds thin films and bulk non-centrosymmetric materials. Finally, I will also discuss their significances for THz enabled nonlinear spectroscopy and quantum phase discovery applications.
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Jigang Wang "Broadband terahertz generation from metamaterials and their hybrid quantum structures (Conference Presentation)", Proc. SPIE 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X, 1010316 (19 April 2017); https://doi.org/10.1117/12.2256804
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KEYWORDS
Terahertz radiation
Metamaterials
Nanostructures
Quantum efficiency
Quantum wells
Resonators
Spectroscopy
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