Ultrathin Planar Cavity Metasurfaces

Hsiang Chu Wang, Cheng Hung Chu, Pin-Chieh Wu, Hui Hsin Hsiao, Hui Jun Wu, Jia Wern Chen, Wei Hou Lee, Yi Chieh Lai, Yao Wei Huang, Ming Lun Tseng, Shu Wei Chang, Din Ping Tsai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

An ultrathin planar cavity metasurface is proposed based on ultrathin film interference and its practicability for light manipulation in visible region is experimentally demonstrated. Phase of reflected light is modulated by finely adjusting the thickness of amorphous silicon (a-Si) by a few nanometers on an aluminum (Al) substrate via nontrivial phase shifts at the interfaces and interference of multireflections generated from the planar cavity. A phase shift of π, the basic requirement for two-level phase metasurface systems, can be accomplished with an 8 nm thick difference. For proof of concept, gradient metasurfaces for beam deflection, Fresnel zone plate metalens for light focusing, and metaholograms for image reconstruction are presented, demonstrating polarization-independent and broadband characteristics. This novel mechanism for phase modulation with ultrathin planar cavity provides diverse routes to construct advanced flat optical devices with versatile applications.

Original languageEnglish
Article number1703920
JournalSmall
Volume14
Issue number17
DOIs
Publication statusPublished - 2018 Apr 26

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Light
Phase shift
Optical Devices
Computer-Assisted Image Processing
Silicon
Aluminum
Ultrathin films
Phase modulation
Optical devices
Image reconstruction
Amorphous silicon
Polarization
Substrates

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

Wang, H. C., Chu, C. H., Wu, P-C., Hsiao, H. H., Wu, H. J., Chen, J. W., ... Tsai, D. P. (2018). Ultrathin Planar Cavity Metasurfaces. Small, 14(17), [1703920]. https://doi.org/10.1002/smll.201703920
Wang, Hsiang Chu ; Chu, Cheng Hung ; Wu, Pin-Chieh ; Hsiao, Hui Hsin ; Wu, Hui Jun ; Chen, Jia Wern ; Lee, Wei Hou ; Lai, Yi Chieh ; Huang, Yao Wei ; Tseng, Ming Lun ; Chang, Shu Wei ; Tsai, Din Ping. / Ultrathin Planar Cavity Metasurfaces. In: Small. 2018 ; Vol. 14, No. 17.
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Wang, HC, Chu, CH, Wu, P-C, Hsiao, HH, Wu, HJ, Chen, JW, Lee, WH, Lai, YC, Huang, YW, Tseng, ML, Chang, SW & Tsai, DP 2018, 'Ultrathin Planar Cavity Metasurfaces', Small, vol. 14, no. 17, 1703920. https://doi.org/10.1002/smll.201703920

Ultrathin Planar Cavity Metasurfaces. / Wang, Hsiang Chu; Chu, Cheng Hung; Wu, Pin-Chieh; Hsiao, Hui Hsin; Wu, Hui Jun; Chen, Jia Wern; Lee, Wei Hou; Lai, Yi Chieh; Huang, Yao Wei; Tseng, Ming Lun; Chang, Shu Wei; Tsai, Din Ping.

In: Small, Vol. 14, No. 17, 1703920, 26.04.2018.

Research output: Contribution to journalArticle

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AU - Chu, Cheng Hung

AU - Wu, Pin-Chieh

AU - Hsiao, Hui Hsin

AU - Wu, Hui Jun

AU - Chen, Jia Wern

AU - Lee, Wei Hou

AU - Lai, Yi Chieh

AU - Huang, Yao Wei

AU - Tseng, Ming Lun

AU - Chang, Shu Wei

AU - Tsai, Din Ping

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Wang HC, Chu CH, Wu P-C, Hsiao HH, Wu HJ, Chen JW et al. Ultrathin Planar Cavity Metasurfaces. Small. 2018 Apr 26;14(17). 1703920. https://doi.org/10.1002/smll.201703920