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Lee, Jongwon
Nanostructured Photonic Devices Lab (NPDL)
Research Interests
  • Plasmonics, metasurfaces, metamaterials, surface-enhanced infrared absorption spectroscopy, orbital angular momentum generation

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Nonlinear processes in multi-quantum-well plasmonic metasurfaces: Electromagnetic response, saturation effects, and fundamental limits

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Title
Nonlinear processes in multi-quantum-well plasmonic metasurfaces: Electromagnetic response, saturation effects, and fundamental limits
Author
Gomez-Diaz, J. SebastianTymchenko, MikhailoLee, JongwonBelkin, Mikhail A.Alu, Andrea
Keywords
SPLIT-RING RESONATORS; CASCADE LASER SOURCES; 2ND-HARMONIC GENERATION; ROOM-TEMPERATURE; INTERSUBBAND ABSORPTION; OPTICAL NONLINEARITIES; METAMATERIALS; TRANSITIONS
Issue Date
2015-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.92, no.12, pp.125429-1 - 125429-13
Abstract
Nonlinear metasurfaces based on coupling a locally enhanced plasmonic response to intersubband transitions of n-doped multi-quantum-wells (MQWs) can provide second-order susceptibilities orders of magnitude larger than any other nonlinear flat structure measured so far. Here we present a comprehensive theory to characterize the electromagnetic response of nonlinear processes occurring in ultrathin MQW-based plasmonic metasurfaces, providing a homogeneous model that takes phase matching at the unit-cell level and the influence of saturation and losses into account. In addition, the limits imposed by saturation of the MQW transitions on the nonlinear response of these metasurfaces are analytically derived, revealing useful guidelines to design devices with enhanced performance. Our approach is first validated using experimental data and then applied to theoretically investigate novel designs able to achieve significant second-harmonic generation efficiency in the infrared frequency band.
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DOI
10.1103/PhysRevB.92.125429
ISSN
2469-9950
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