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Title: Active control of chirality in nonlinear metamaterials

Abstract

An all-optical tunabe chirality is realized in a photonic metamaterial, the metamolecule of which consists of a nonlinear nano-Au:polycrystalline indium-tin oxide layer sandwiched between two L-shaped gold nano-antennas twisted 90° with each other. The maximum circular dichroism reached 30%. Under excitation of a 40 kW/cm{sup 2} weak pump light, the peak in the circular dichroism shifts 45 nm in the short-wavelength direction. An ultrafast response time of 35 ps is maintained. This work not only opens up the possibility for the realization of ultralow-power and ultrafast all-optical tunable chirality but also offers a way to construct ultrahigh-speed on-chip biochemical sensors.

Authors:
; ;  [1]; ;  [1]
  1. State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22412744
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTENNAS; CHIRALITY; DICHROISM; EXCITATION; GOLD; INDIUM COMPOUNDS; LAYERS; METAMATERIALS; NONLINEAR PROBLEMS; POLYCRYSTALS; SENSORS; TIN OXIDES; VISIBLE RADIATION

Citation Formats

Zhu, Yu, Chai, Zhen, Yang, Hong, Hu, Xiaoyong, Gong, Qihuang, and Collaborative Innovation Center of Quantum Matter, Beijing 100871. Active control of chirality in nonlinear metamaterials. United States: N. p., 2015. Web. doi:10.1063/1.4914343.
Zhu, Yu, Chai, Zhen, Yang, Hong, Hu, Xiaoyong, Gong, Qihuang, & Collaborative Innovation Center of Quantum Matter, Beijing 100871. Active control of chirality in nonlinear metamaterials. United States. doi:10.1063/1.4914343.
Zhu, Yu, Chai, Zhen, Yang, Hong, Hu, Xiaoyong, Gong, Qihuang, and Collaborative Innovation Center of Quantum Matter, Beijing 100871. Mon . "Active control of chirality in nonlinear metamaterials". United States. doi:10.1063/1.4914343.
@article{osti_22412744,
title = {Active control of chirality in nonlinear metamaterials},
author = {Zhu, Yu and Chai, Zhen and Yang, Hong and Hu, Xiaoyong and Gong, Qihuang and Collaborative Innovation Center of Quantum Matter, Beijing 100871},
abstractNote = {An all-optical tunabe chirality is realized in a photonic metamaterial, the metamolecule of which consists of a nonlinear nano-Au:polycrystalline indium-tin oxide layer sandwiched between two L-shaped gold nano-antennas twisted 90° with each other. The maximum circular dichroism reached 30%. Under excitation of a 40 kW/cm{sup 2} weak pump light, the peak in the circular dichroism shifts 45 nm in the short-wavelength direction. An ultrafast response time of 35 ps is maintained. This work not only opens up the possibility for the realization of ultralow-power and ultrafast all-optical tunable chirality but also offers a way to construct ultrahigh-speed on-chip biochemical sensors.},
doi = {10.1063/1.4914343},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 9,
volume = 106,
place = {United States},
year = {2015},
month = {3}
}