Chip-scale blue light phased array
Abstract
Compact beam steering in the visible spectral range is required for a wide range of emerging applications, such as augmented and virtual reality displays, optical traps for quantum information processing, biological sensing, and stimulation. Optical phased arrays (OPAs) can shape and steer light to enable these applications with no moving parts on a compact chip. However, OPA demonstrations have been mainly limited to the near-infrared spectral range due to the fabrication and material challenges imposed by the shorter wavelengths. Here, we demonstrate the first chip-scale phased array operating at blue wavelengths (488 nm) using a high-confinement silicon nitride platform. We use a sparse aperiodic emitter layout to mitigate fabrication constraints at this short wavelength and achieve wide-angle beam steering over a 50° field of view with a full width at half-maximum beam size of 0.17°. Large-scale integration of this platform paves the way for fully reconfigurable chip-scale three-dimensional volumetric light projection across the entire visible range.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 23, 2020
- Source ID
- 10.1364/ol.385201
Entities
People
- Aseema Mohanty
- Brian S. Lee
- Christopher T. Phare
- Gaurang Ravindra Bhatt
- Ipshita Datta
- Kyle Watson
- Michal Lipson
- Min Chul Shin
- Moshe Zadka
- Steven A. Miller
- Xingchen Ji
Organizations
- Defense Advanced Research Projects Agency