Reconfigurable Terahertz Metasurface Pure Phase Holograms
- Capital Normal Univ., Beijing (China); Chinese Academy of Sciences (CAS), Shanghai (China); Univ. of Chinese Academy of Sciences, Beijing (China)
- Capital Normal Univ., Beijing (China)
- Chinese Academy of Sciences (CAS), Shanghai (China); Univ. of Chinese Academy of Sciences, Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Terahertz (THz) radiation has many potential applications. However, comparing with the rapid development of THz sources and detectors, functional devices for THz modulation, especially the spatial modulation devices, are still insufficient. Here, we present a novel approach for generating arbitrary wavefronts of a THz beam is presented. By dynamically creating metasurface structures through illuminating a thin silicon wafer with femtosecond laser, which is spatially modulated, an array of reconfigurable subwavelength resonators is generated. The wavefront of the THz beam is then determined by forming spatial profiles of the Pancharatnam–Berry scattering phase by dynamically controlling the resonator orientation. Proof-of-concept experiments demonstrate that streaming holographic images and lenses of variable focal length can be realized in real time. The reconfigurable scheme demonstrated here is convenient and fast, and may lead to advances in a host of THz applications.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1597359
- Alternate ID(s):
- OSTI ID: 1513319
- Report Number(s):
- LA-UR--19-29781
- Journal Information:
- Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 10 Vol. 7; ISSN 2195-1071
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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