Tech Briefs Magazine - May 2022 - 43

Microdisplay and
Relay Optics
structures imprinted on the freeform
optic. That meant changing the shape
of the freeform lens and distributing
the nanostructures on the lens in a way
that the two of them work in synergy,
producing an optical device with good
optical performance.
Metaform
Combiner
Freeform
Optic
A metaform is an optical component that combines with freeform optics to create the next generation
of AR/VR headsets and eyewear. (Photo: University of Rochester illustration/Michael Osadciw)
head to conform to an eyeglass format,
not all of the light is directed to the eye.
Freeform optics alone cannot solve this
specific challenge.
That's why the researchers had to
leverage a metasurface to build a new
optical component. Another obstacle
was bridging from macroscale to
nanoscale. The actual focusing device
measures about 2.5 millimeters
across. But even that is 10,000 times
larger than the smallest of the nanoFabrication
required using electron-beam
lithography in which beams
of electrons were used to cut away
sections of the thin-film metasurface
where the silver nanostructures needed
to be deposited. Writing with electron
beams on curved freeform surfaces is
atypical and required developing new
fabrication processes. The researchers
used a JEOL electron-beam lithography
(EBL) machine.
To write the metasurfaces on a curved
freeform optic, they first created a 3D
map of the freeform surface using a
laser-probe measuring system. The 3D
map was then programmed into the
JEOL machine to specify at what height
each of the nanostructures needed to
be fabricated.
For more information, contact Bob Marcotte
at bmarcotte@ur.rochester.edu.
Composite Glass Produces Unbreakable Screens
The technology will enable the manufacture of glass screens that are not only unbreakable
but also deliver crystal-clear image quality.
University of Queensland, Australia
R
esearchers have developed technology
to produce next-generation composite
glass for lighting LEDs and smartphone,
television, and computer screens.
The technology was a step forward in
perovskite nanocrystal technology since
previously, researchers were only able to
produce this technology in the bone-dry
atmosphere of a laboratory setting.
The emitting materials are made from
nanocrystals, also called lead-halide perovskites.
They can harvest sunlight and
concert it into renewable electricity, playing
a vital role in low-cost and high-efficiency
solar cells and applications like
lighting. The nanocrystals, however, are
extremely sensitive to light, heat, air,
and water - even water vapor in the air
would kill the current devices in a matter
of minutes.
The emitting materials are made from nanocrystals. (Photo: University of Queensland)
Tech Briefs, May 2022
www.techbriefs.com
The team developed a process to wrap
or bind the nanocrystals in porous glass.
The process is key to stabilizing the materials,
enhancing their efficiency, and inhibiting
the toxic lead ions from leaching
out from the materials.
At present, quantum dot light-emitting
diode screens are considered the best
choice for image display and performance;
however, the new nanocrystal technology
will also offer exceptional picture quality
and strength. Not only can the nanocrystals
be made more robust but their opto-electronic
properties can also be tuned
with greater light emission efficiency and
highly desirable white light LEDs.
For more information, contact Dr. Jingwei
Hou at jingwei.hou@uq.edu.au; +61 (0)478
397 525.
43
TB Optics 0522_2.indd 43
Cov
ToC
4/19/22 8:33 AM
http://www.techbriefs.com http://info.hotims.com/82321-809

Tech Briefs Magazine - May 2022

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

Tech Briefs Magazine - May 2022 - Intro
Tech Briefs Magazine - May 2022 - Sponsor
Tech Briefs Magazine - May 2022 - Cov1
Tech Briefs Magazine - May 2022 - Cov2
Tech Briefs Magazine - May 2022 - 1
Tech Briefs Magazine - May 2022 - 2
Tech Briefs Magazine - May 2022 - 3
Tech Briefs Magazine - May 2022 - 4
Tech Briefs Magazine - May 2022 - 5
Tech Briefs Magazine - May 2022 - 6
Tech Briefs Magazine - May 2022 - 7
Tech Briefs Magazine - May 2022 - 8
Tech Briefs Magazine - May 2022 - 9
Tech Briefs Magazine - May 2022 - 10
Tech Briefs Magazine - May 2022 - 11
Tech Briefs Magazine - May 2022 - 12
Tech Briefs Magazine - May 2022 - 13
Tech Briefs Magazine - May 2022 - 14
Tech Briefs Magazine - May 2022 - 15
Tech Briefs Magazine - May 2022 - 16
Tech Briefs Magazine - May 2022 - 17
Tech Briefs Magazine - May 2022 - 18
Tech Briefs Magazine - May 2022 - 19
Tech Briefs Magazine - May 2022 - 20
Tech Briefs Magazine - May 2022 - 21
Tech Briefs Magazine - May 2022 - 22
Tech Briefs Magazine - May 2022 - 23
Tech Briefs Magazine - May 2022 - 24
Tech Briefs Magazine - May 2022 - 25
Tech Briefs Magazine - May 2022 - 26
Tech Briefs Magazine - May 2022 - 27
Tech Briefs Magazine - May 2022 - 28
Tech Briefs Magazine - May 2022 - 29
Tech Briefs Magazine - May 2022 - 30
Tech Briefs Magazine - May 2022 - 31
Tech Briefs Magazine - May 2022 - 32
Tech Briefs Magazine - May 2022 - 33
Tech Briefs Magazine - May 2022 - 34
Tech Briefs Magazine - May 2022 - 35
Tech Briefs Magazine - May 2022 - 36
Tech Briefs Magazine - May 2022 - 37
Tech Briefs Magazine - May 2022 - 38
Tech Briefs Magazine - May 2022 - 39
Tech Briefs Magazine - May 2022 - 40
Tech Briefs Magazine - May 2022 - 41
Tech Briefs Magazine - May 2022 - 42
Tech Briefs Magazine - May 2022 - 43
Tech Briefs Magazine - May 2022 - 44
Tech Briefs Magazine - May 2022 - 45
Tech Briefs Magazine - May 2022 - 46
Tech Briefs Magazine - May 2022 - 47
Tech Briefs Magazine - May 2022 - 48
Tech Briefs Magazine - May 2022 - 49
Tech Briefs Magazine - May 2022 - 50
Tech Briefs Magazine - May 2022 - 51
Tech Briefs Magazine - May 2022 - 52
Tech Briefs Magazine - May 2022 - 53
Tech Briefs Magazine - May 2022 - 54
Tech Briefs Magazine - May 2022 - 55
Tech Briefs Magazine - May 2022 - 56
Tech Briefs Magazine - May 2022 - 57
Tech Briefs Magazine - May 2022 - 58
Tech Briefs Magazine - May 2022 - 59
Tech Briefs Magazine - May 2022 - 60
Tech Briefs Magazine - May 2022 - Cov3
Tech Briefs Magazine - May 2022 - Cov4
Tech Briefs Magazine - May 2022 - PIT-Cov1
Tech Briefs Magazine - May 2022 - PIT-Cov2
Tech Briefs Magazine - May 2022 - PIT-1
Tech Briefs Magazine - May 2022 - PIT-2
Tech Briefs Magazine - May 2022 - PIT-3
Tech Briefs Magazine - May 2022 - PIT-4
Tech Briefs Magazine - May 2022 - PIT-5
Tech Briefs Magazine - May 2022 - PIT-6
Tech Briefs Magazine - May 2022 - PIT-7
Tech Briefs Magazine - May 2022 - PIT-8
Tech Briefs Magazine - May 2022 - PIT-9
Tech Briefs Magazine - May 2022 - PIT-10
Tech Briefs Magazine - May 2022 - PIT-11
Tech Briefs Magazine - May 2022 - PIT-12
Tech Briefs Magazine - May 2022 - PIT-13
Tech Briefs Magazine - May 2022 - PIT-14
Tech Briefs Magazine - May 2022 - PIT-15
Tech Briefs Magazine - May 2022 - PIT-16
Tech Briefs Magazine - May 2022 - PIT-17
Tech Briefs Magazine - May 2022 - PIT-18
Tech Briefs Magazine - May 2022 - PIT-19
Tech Briefs Magazine - May 2022 - PIT-20
Tech Briefs Magazine - May 2022 - PIT-21
Tech Briefs Magazine - May 2022 - PIT-22
Tech Briefs Magazine - May 2022 - PIT-23
Tech Briefs Magazine - May 2022 - PIT-24
Tech Briefs Magazine - May 2022 - PIT-25
Tech Briefs Magazine - May 2022 - PIT-26
Tech Briefs Magazine - May 2022 - PIT-27
Tech Briefs Magazine - May 2022 - PIT-28
Tech Briefs Magazine - May 2022 - PIT-Cov3
Tech Briefs Magazine - May 2022 - PIT-Cov4
Tech Briefs Magazine - May 2022 - BET-Cov1a
Tech Briefs Magazine - May 2022 - BET-Cov1b
Tech Briefs Magazine - May 2022 - BET-Cov1
Tech Briefs Magazine - May 2022 - BET-Cov2
Tech Briefs Magazine - May 2022 - BET-1
Tech Briefs Magazine - May 2022 - BET-2
Tech Briefs Magazine - May 2022 - BET-3
Tech Briefs Magazine - May 2022 - BET-4
Tech Briefs Magazine - May 2022 - BET-5
Tech Briefs Magazine - May 2022 - BET-6
Tech Briefs Magazine - May 2022 - BET-7
Tech Briefs Magazine - May 2022 - BET-8
Tech Briefs Magazine - May 2022 - BET-9
Tech Briefs Magazine - May 2022 - BET-10
Tech Briefs Magazine - May 2022 - BET-11
Tech Briefs Magazine - May 2022 - BET-12
Tech Briefs Magazine - May 2022 - BET-13
Tech Briefs Magazine - May 2022 - BET-14
Tech Briefs Magazine - May 2022 - BET-15
Tech Briefs Magazine - May 2022 - BET-16
Tech Briefs Magazine - May 2022 - BET-17
Tech Briefs Magazine - May 2022 - BET-18
Tech Briefs Magazine - May 2022 - BET-19
Tech Briefs Magazine - May 2022 - BET-20
Tech Briefs Magazine - May 2022 - BET-21
Tech Briefs Magazine - May 2022 - BET-22
Tech Briefs Magazine - May 2022 - BET-23
Tech Briefs Magazine - May 2022 - BET-24
Tech Briefs Magazine - May 2022 - BET-25
Tech Briefs Magazine - May 2022 - BET-26
Tech Briefs Magazine - May 2022 - BET-27
Tech Briefs Magazine - May 2022 - BET-Cov3
https://www.nxtbook.com/smg/techbriefs/24TB03
https://www.nxtbook.com/smg/techbriefs/24TB02
https://www.nxtbook.com/smg/techbriefs/24TB01
https://www.nxtbook.com/smg/techbriefs/23TB12
https://www.nxtbook.com/smg/techbriefs/23TB11
https://www.nxtbook.com/smg/techbriefs/23TB10
https://www.nxtbook.com/smg/techbriefs/23TB09
https://www.nxtbook.com/smg/techbriefs/23TB08
https://www.nxtbook.com/smg/techbriefs/23TB07
https://www.nxtbook.com/smg/techbriefs/23TB06
https://www.nxtbook.com/smg/techbriefs/23TB05
https://www.nxtbook.com/smg/techbriefs/23TB04
https://www.nxtbook.com/smg/techbriefs/23TB03
https://www.nxtbook.com/smg/techbriefs/23TB02
https://www.nxtbook.com/smg/techbriefs/23TB01
https://www.nxtbook.com/smg/Testing/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB11
https://www.nxtbook.com/smg/techbriefs/22TB10
https://www.nxtbook.com/smg/techbriefs/22TB09
https://www.nxtbook.com/smg/techbriefs/22TB08
https://www.nxtbook.com/smg/techbriefs/22TB07
https://www.nxtbook.com/smg/techbriefs/22TB06
https://www.nxtbook.com/smg/techbriefs/22TB05-P
https://www.nxtbook.com/smg/techbriefs/22TB05-D
https://www.nxtbook.com/smg/techbriefs/22TB04
https://www.nxtbook.com/smg/techbriefs/22TB03
https://www.nxtbook.com/smg/techbriefs/22TB02
https://www.nxtbook.com/smg/techbriefs/22TB01
https://www.nxtbook.com/smg/techbriefs/21TB12
https://www.nxtbook.com/smg/techbriefs/21TB11
https://www.nxtbook.com/smg/techbriefs/21TB10
https://www.nxtbook.com/smg/techbriefs/21TB09
https://www.nxtbook.com/smg/techbriefs/21TB08
https://www.nxtbook.com/smg/techbriefs/21TB07
https://www.nxtbook.com/smg/techbriefs/21TB06
https://www.nxtbook.com/smg/techbriefs/21TB05
https://www.nxtbook.com/smg/techbriefs/21TB04
https://www.nxtbook.com/smg/techbriefs/21BT03
https://www.nxtbook.com/smg/techbriefs/21TB02
https://www.nxtbookmedia.com