Ultralow-power all-optical tunable dual Fano resonances in nonlinear metamaterials

Journal Article · Mon Nov 04 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4829655· OSTI ID:22254115

Zhang, Fan; Zhu, Yu; Yang, Hong ^[1]; Hu, Xiaoyong; Gong, Qihuang ^[1]

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1. State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 (China)

Dual Fano resonances are realized in a nonlinear photonic metamaterial consisting of periodic arrays of asymmetrical meta-molecules etched in a gold film coated with azobenzene polymer layer made of poly[(methyl methacrylate)-co-(disperse red 13 acrylate)]. Enormously enhanced photoisomerization associated with resonant excitation brings about a large refractive index variation in the azobenzene polymer. Under excitation of a weak pump light as low as 0.61 kW/cm{sup 2}, a large shift of 50 nm in the Fano resonance wavelength is obtained. Compared with previous reports, the threshold pump intensity is reduced by seven orders of magnitude while a large tunability is maintained simultaneously.

• OSTI ID: 22254115
• Journal Information: Applied Physics Letters, Vol. 103, Issue 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACRYLATES
EXCITATION
LAYERS
METHACRYLIC ACID ESTERS
MOLECULES
NONLINEAR PROBLEMS
PERIODICITY
POLYMERS
REFRACTIVE INDEX
WAVELENGTHS