Design for dynamic wavefront manipulation based on phase change materials

Ming Zhang; Fei Zhang; Honglin Yu

doi:10.1117/12.2505550

24 January 2019 Design for dynamic wavefront manipulation based on phase change materials

Ming Zhang, Fei Zhang, Honglin Yu

Proceedings Volume 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 1084004 (2019) https://doi.org/10.1117/12.2505550
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

In the past decades, metasurfaces have shown their extraordinary ability to manipulate the wavefront of electromagnetic wave. However, the most of previously proposed designs based on metasurfaces are fixed once design, which are unsuitable for applications where light manipulation needs to be dynamically. In this paper, we proposed a design for dynamic wavefront manipulation achieved by the combination of metasurfaces and phase change materials (PCM) in the near infrared spectral range. Here, we present a metal-insulator-metal (MIM) configuration with the polarization conversion exceeding 80% for circular polarized (CP) light converted to its opposite handedness when PCM is in the amorphous state, but the efficiency turns to 0 when PCM switch into its crystalline state. By utilizing the Pancharatnam- Berry (PB) phase, we can achieve the dynamic wavefront manipulation between the amorphous and crystalline states. As a proof-of-concept, a deflector and focus lens are designed and characterized, and the results further verify the ability for dynamic wavefront manipulation. It is believed that the design in our work may pave the way towards the dynamic manipulation of light.

Citation Download Citation

Ming Zhang, Fei Zhang, and Honglin Yu "Design for dynamic wavefront manipulation based on phase change materials", Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 1084004 (24 January 2019); https://doi.org/10.1117/12.2505550

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KEYWORDS

Wavefronts

Crystals

Reflectivity

Polarization

Reflection

Antennas

Gold

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