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http://hdl.handle.net/10397/77739
| Title: | Nonlinear frequency up-conversion via double topological edge modes | Authors: | Qian, C Choi, KH Wu, RPH Zhang, Y Guo, K Fung, KH |
Issue Date: | 19-Feb-2018 | Source: | Optics express, 2018, v. 26, no. 4, p. 5083-5091 | Abstract: | We study the nonlinear frequency up-conversion in a plasmonic thin film sandwiched between one-dimensional photonic crystals (PCs) of different Zak phases by rigorous numerical time-domain nonlinear hydrodynamic calculations. We show that the proposed hetero-structure can support robust fundamental and high-order topological edge modes that simultaneously enhance the third-harmonic generation. Numerical simulations also show that femtosecond pulses can excite double topological edge modes through optical tunneling in band gaps, leading to a large nonlinear response. The obtained third harmonic generation (THG) conversion efficiency of the hetero-structure is three orders of magnitude larger than that of a single plasmonic film. The results presented here may open new avenues for designing high-efficiency nonlinear photonic devices. | Publisher: | Optical Society of America | Journal: | Optics express | EISSN: | 1094-4087 | DOI: | 10.1364/OE.26.005083 | Rights: | © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (https://opg.optica.org/library/license_v1.cfm#VOR-OA). Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. |
| Appears in Collections: | Journal/Magazine Article |
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|---|---|---|---|---|
| oe-26-4-5083.pdf | 2.81 MB | Adobe PDF | View/Open |
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