Tech Briefs Magazine - August 2022 - 37

conducted by adhering them to curved
surfaces as well as to materials that were
subsequently twisted, bent, and crumpled.
Bending and cutting do not affect
the quality or electronic properties of
the LED.
The flexible micro LEDs can be twisted (left) or folded (right). (Image: University of Texas)
The bendy LEDs have a variety of possible
uses including flexible lighting,
clothing, and wearable biomedical devices.
From a manufacturing perspective,
the fabrication technique offers another
advantage: Because the LED can
be removed without breaking the underlying
wafer substrate, the wafer can be
used repeatedly. The researchers also
are applying the fabrication technique
to other types of materials.
For more information, contact the
Office of Media Relations at newscenter@
utdallas.edu; 972-883-2155.
Silicon Chip Improves LiDAR
Bulky, heavy LiDAR systems in self-driving cars could be replaced with a single chip.
University of Colorado, Boulder, CO
W
hether it's on top of a self-driving
car or embedded inside the latest
gadget, Light Detection and Ranging
(LiDAR) systems will likely play an important
role in enabling vehicles to see
in real time, phones to map three-dimensional
images, and enhancing augmented
reality in video games. The challenge
is that these 3D imaging systems
can be bulky, expensive, and hard to
shrink down to the size needed for new
applications.
Researchers have created a new silicon
chip - with no moving parts or electronics
- that improves the resolution
and scanning speed needed for a LiDAR
system. Big, bulky, heavy LiDAR systems
could be replaced with a flat chip.
Current commercial LiDAR systems
use large, rotating mirrors to steer the
laser beam and thereby create a 3D image.
A new way of steering laser beams
is wavelength steering where each
wavelength or " color " of the laser is
pointed to a unique angle. The researchers
de veloped a way to accomplish
this along two dimensions simultaneously
with color using a " rainbow "
pattern to take 3D images. Since the
beams are easily controlled by simply
changing colors, multiple phased arrays
can be controlled simultaneously
to create a bigger aperture and a higher-resolution
image.
Tech Briefs, August 2022
A silicon chip with a tiled array of serpentine optical phased array (SOPA) tiles. The 32 tiles in the 8
x 4 array have slightly differing grating designs, showing here two matching pairs of tiles " lighting
up " at this viewing angle. Superimposed are beams from two matching tiles and the far field beam
interference pattern demonstrating tiled beam forming. (Image: Bohan Zhang and Nathan Dostart)
www.techbriefs.com
37

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Tech Briefs Magazine - August 2022

Table of Contents for the Digital Edition of Tech Briefs Magazine - August 2022

Tech Briefs Magazine - August 2022 - Intro
Tech Briefs Magazine - August 2022 - Sponsor
Tech Briefs Magazine - August 2022 - Cov1
Tech Briefs Magazine - August 2022 - Cov2
Tech Briefs Magazine - August 2022 - 1
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Tech Briefs Magazine - August 2022 - Cov3
Tech Briefs Magazine - August 2022 - Cov4
Tech Briefs Magazine - August 2022 - MD-Cov1
Tech Briefs Magazine - August 2022 - MD-Cov2
Tech Briefs Magazine - August 2022 - MD-1
Tech Briefs Magazine - August 2022 - MD-2
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Tech Briefs Magazine - August 2022 - MD-37
Tech Briefs Magazine - August 2022 - MD-Cov4
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