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Adiabatic Frequency Conversion Using a Time-Varying Epsilon-Near-Zero Metasurface.
Pang, Kai; Alam, M Zahirul; Zhou, Yiyu; Liu, Cong; Reshef, Orad; Manukyan, Karapet; Voegtle, Matt; Pennathur, Anuj; Tseng, Cindy; Su, Xinzhou; Song, Hao; Zhao, Zhe; Zhang, Runzhou; Song, Haoqian; Hu, Nanzhe; Almaiman, Ahmed; Dawlaty, Jahan M; Boyd, Robert W; Tur, Moshe; Willner, Alan E.
Afiliación
  • Pang K; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Alam MZ; Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.
  • Zhou Y; The Institute of Optics, University of Rochester, Rochester, New York 14627, United States.
  • Liu C; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Reshef O; Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States.
  • Manukyan K; Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.
  • Voegtle M; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Pennathur A; Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.
  • Tseng C; Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.
  • Su X; Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.
  • Song H; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Zhao Z; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Zhang R; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Song H; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Hu N; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Almaiman A; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Dawlaty JM; Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States.
  • Boyd RW; King Saud University, Riyadh, Saudi Arabia.
  • Tur M; Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States.
  • Willner AE; Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.
Nano Lett ; 21(14): 5907-5913, 2021 07 28.
Article en En | MEDLINE | ID: mdl-34251831
ABSTRACT
A time-dependent change in the refractive index of a material leads to a change in the frequency of an optical beam passing through that medium. Here, we experimentally demonstrate that this effect-known as adiabatic frequency conversion (AFC)-can be significantly enhanced by a nonlinear epsilon-near-zero-based (ENZ-based) plasmonic metasurface. Specifically, by using a 63-nm-thick metasurface, we demonstrate a large, tunable, and broadband frequency shift of up to ∼11.2 THz with a pump intensity of 4 GW/cm2. Our results represent a decrease of ∼10 times in device thickness and 120 times in pump peak intensity compared with the cases of bare, thicker ENZ materials for the similar amount of frequency shift. Our findings might potentially provide insights for designing efficient time-varying metasurfaces for the manipulation of ultrafast pulses.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos