Journal
OPTICA
Volume 7, Issue 1, Pages 47-52Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.381484
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- Accelerated Innovation Research Initiative Turning Top Science and Ideas intoHigh-ImpactValues [JPMJAC1603]
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A lattice-shifted photonic crystal waveguide (LSPCW) maintains slow light as a guided mode and works as an optical antenna when a kind of double periodicity is introduced. Selecting one LSPCW from its array and converting the fan beam to a spot beam using a collimator lens allows non-mechanical, two-dimensional beam steering. We employed a shallow-etched grating into the LSPCW as the double periodicity to increase the upward emission efficiency and designed a bespoke prism lens to convert the steering angle in a desired direction while maintaining the collimation condition for the steered beam. As a result, a sharp spot beam with an average beam divergence of 0.15 degrees was steered in the range of 40 degrees x 4.4 degrees without precise adjustment of the lens position. The number of resolution points obtained was 4256. This method did not require complicated and power-consuming optical phase control like that in optical phased arrays, so it is expected to be applied in complete solid-state light detection and ranging. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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