Low-power all-optical tunable plasmonic-mode coupling in nonlinear metamaterials

Journal Article · Mon Mar 31 04:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4870527· OSTI ID:22261602

Zhang, Fan; 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)

All-optical tunable plasmonic-mode coupling is realized in a nonlinear photonic metamaterial consisting of periodic arrays of gold asymmetrically split ring resonators, covered with a poly[(methyl methacrylate)-co-(disperse red 13 acrylate)] azobenzene polymer layer. The third-order optical nonlinearity of the azobenzene polymer is enormously enhanced by using resonant excitation. Under excitation with a 17-kW/cm{sup 2}, 532-nm pump light, plasmonic modes shift by 51 nm and the mode interval is enlarged by 30 nm. Compared with previous reports, the threshold pump intensity is reduced by five orders of magnitude, while extremely large tunability is maintained.

• OSTI ID: 22261602
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACRYLATES
EXCITATION
GOLD
METHACRYLIC ACID ESTERS
NONLINEAR PROBLEMS
POLYMERS
VISIBLE RADIATION