A Facile Strategy for All-Optical Controlling Platform by Using Plasmonic Perfect Absorbers |
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| Authors: | Zhengqi Liu Guolan Fu Yan-Xing Yang Pingping Pan Zhenping Huang Jian Chen |
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| Institution: | 1.Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics,Jiangxi Normal University,Nanchang,China |
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| Abstract: | Dual-band light absorption with the maximal absorptivity up to 99.7% and the minimal spectral bandwidth down to 3 nm is obtained in the plasmonic absorbers consisting of triple-layer plasmonic crystal-nonlinear medium cavity-metal substrate structure, where the intercalated dielectric material is chosen to be a Kerr medium cavity. Efficient all-optical controlling with high spectral intensity change ratios and detecting signal-to-noise is achieved for the system after a slight increase of pumping intensity. These impressive results mainly result from the strong plasmonic resonant field confinement in the middle nonlinear Kerr medium cavity and the near-perfect relative intensity change response by the ultra-sharp anti-reflection spectrum. This work can lay a foundation for advanced all-optical devices by exploiting light perfect absorption behavior and resonant optical field enhancement. |
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