Electrically Tunable Transparent Displays for Visible
Light Based on Dielectric Metasurfaces
Chengjun Zou
Andrei Komar
Stefan Fasold
Justus Bohn
Alexander A. Muravsky
Anatoli A. Murauski
Thomas Pertsch
Dragomir N. Neshev
Isabelle Staude
10.1021/acsphotonics.9b00301.s001
https://acs.figshare.com/articles/journal_contribution/Electrically_Tunable_Transparent_Displays_for_Visible_Light_Based_on_Dielectric_Metasurfaces/8132276
Tunable
dielectric metasurfaces able to manipulate visible light
with high efficiency are promising for applications in displays, reconfigurable
optical components, beam steering, and spatial light modulation. Infiltration
of dielectric metasurfaces with nematic liquid crystals (LCs) is an
attractive tuning approach, which is highly compatible with existing
industrial platforms for optical and electronic devices. Here, we
demonstrate electrically tunable transparent displays based on nematic
LC-infiltrated tunable dielectric metasurfaces at visible frequencies.
Importantly, the technique of photoalignment of LCs is adopted to
improve the LC prealignment quality and thus the tuning accuracy and
contrast in the visible. By applying a voltage across the infiltrated
metasurface cell, we observe resonance shifts that are more than twice
larger than their line width. We track the spectral shifts of the
electric and magnetic dipole resonances as they move into and out
of the so-called Huygens’ regime of high transparency originating
from spectrally overlapping electric and magnetic dipole resonances.
Furthermore, we realize a switchable metasurface display with a measured
modulation depth of 53% at 669 nm operation wavelength for an applied
voltage of 20 V. The novel LC tuning platform demonstrated in our
work may lead to the development of next-generation LC display devices
that are able to overcome current limitations of minimal pixel size
and speed of operation.
2019-05-07 00:00:00
modulation depth
switchable metasurface display
metasurface cell
platform
resonance shifts
dielectric metasurfaces
pixel size
nematic LC-infiltrated tunable dielectric metasurfaces
Electrically Tunable
line width
novel LC
next-generation LC display devices
669 nm operation wavelength
light modulation
LC prealignment quality
20 V
Dielectric Metasurfaces Tunable dielectric metasurfaces
Visible Light
beam steering
voltage