AI Article Synopsis
- A new Si photonic crystal waveguide can steer light beams without mechanical parts, making it useful for applications like light detection and ranging.
- Researchers created a prism lens that focuses a fan-shaped beam emitted from the waveguide, which works regardless of the angle it is aimed.
- By using ray tracing techniques, the lens successfully reduces beam divergence to below the diffraction limit in most cases, and it is made using acrylic cutting, showing strong performance in tests.
Article Abstract
The doubly periodic Si photonic crystal waveguide operates as a nonmechanical beam-steering device that can be applied in light detection and ranging. In this Letter, we develop and describe a prism lens that collimates a fan-shaped beam, emitted from the waveguide independent of the steering angle. Its fundamental profile is investigated using a theoretical analysis for thick lenses, and then, its detailed aspherical design is obtained. In ray tracing, this prism lens suppresses the beam divergence to less than the diffraction limit in most of the targeted beam-steering range. The prism lens is fabricated by acrylic cutting, and its expected characteristics are observed.
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| http://dx.doi.org/10.1364/OL.44.005780 | DOI Listing |
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