Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Waveguide-type Multidirectional Light Field Display

  • Received : 2022.05.03
  • Accepted : 2022.06.14
  • Published : 2022.08.25
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Abstract

We demonstrate two types of light field displays based on waveguide grating coupler arrays: a line beam type and a point source type. Ultra violet imprinting of an array of diffractive nanograting cells on the top surface of a 50-㎛-thin slab waveguide can deliver a line beam or a point beam to a multidirectional light field out of the waveguide slab. By controlling the grating vectors of the nanograting cells, the waveguide modes are externally coupled to specific viewing angles to create a multidirectional light field display. Nanograting cells with periods of 300 nm-518 nm and slanted angles of -8.5°~+8.5° are fabricated by two-beam interference lithography on a 40 mm × 40 mm slab waveguide for seven different viewpoints. It is expected that it will be possible to realize a very thin and flexible panel that shows multidirectional light field images through the waveguide-type diffraction display.

Keywords

Acknowledgement

In part by the Basic Science Research Program (NRF-2018R1A2B3002539); the Leader Researcher Program (NRF-2019R1A3B2068083); and the research fund of Hanyang University (HY-202000000000513).

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