| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Dual-wavelength polarization-tunable holographic response in an azobenzene-containing film |
| Hong Chen(陈红)1, Pan Wang(王潘)2, Ziyao Lyu(吕子瑶)3, and Changshun Wang(王长顺)1,† |
1 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
2 Department of Information and Communications Engineering, Institute of Science Tokyo, Tokyo 1528550, Japan;
3 State Key Laboratory of Space-Ground Integrated Information Technology, Beijing Institute of Satellite Information Engineering, Beijing 100095, China |
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Abstract We report a polarization-tunable holographic system in an azobenzene-containing liquid crystal film enabled by dual-wavelength excitation. The 405-nm beam facilitates the accumulation of cis-isomers and enhances molecular mobility, while the 532-nm beams induce photoisomerization and polarization-selective molecular alignment. Their cooperative action yields a nonlinear holographic response, resulting in a twofold increase in diffraction efficiency compared to single-wavelength excitation. By tuning the polarization states of the 532-nm beams, a continuous transition from an amplitude to polarization grating is realized, together with passive all-optical switching. This approach offers a versatile strategy for dynamic holographic modulation, with potential applications in tunable photonic elements, polarization-selective optical devices, and reconfigurable optical switches driven by polarization control.
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Received: 29 July 2025
Revised: 09 September 2025
Accepted manuscript online: 25 September 2025
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 62475148 and 62505028). |
Corresponding Authors:
Changshun Wang
E-mail: cswang@sjtu.edu.cn
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Cite this article:
Hong Chen(陈红), Pan Wang(王潘), Ziyao Lyu(吕子瑶), and Changshun Wang(王长顺) Dual-wavelength polarization-tunable holographic response in an azobenzene-containing film 2026 Chin. Phys. B 35 054206
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