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Ultra-compact nonvolatile phase shifter based on electrically reprogrammable transparent phase change materials
PhotoniX -
AbstractOptical phase shifters constitute the fundamental building blocks that
enable programmable photonic integrated circuits (PICs)—the cornerstone of
on-chip classical and quantum optical technologies [1, 2]. Thus far, carrier
modulation and thermo-optical effect are the chosen phenomena for ultrafast and
low-loss phase shifters, respectively; however, the state and information they
carry are ...
A brief review of the technological advancements of phase measuring deflectometry
PhotoniX - Tập 1 - Trang 1-10 - 2020
This paper presents a short review for phase measuring deflectometry (PMD). PMD
is a phase calculation based technique for three-dimensional (3D) measurement of
specular surfaces. PMD can achieve nano-scale form measurement accuracy with the
advantages of high dynamic range, non-contact, full field measurement which
makes it a competitive method for specular surface measurement. With the
developme...
Ultrafast modulation of valley dynamics in multiple WS2 − Ag gratings strong coupling system
PhotoniX - Tập 3 - Trang 1-20 - 2022
Strong light-matter interactions in two-dimensional transition metal
dichalcogenides (TMDCs) with robust spin-valley degrees of freedom open up the
prospect of valleytronic devices. A thorough understanding on the dynamics of
the valley polarizations in the strong coupling regime is urgently required.
Here, multiple polarized TMDCs-SPPs hybrid systems were constructed by combining
monolayer WS2 fl...
Manipulating light transmission and absorption via an achromatic reflectionless metasurface
PhotoniX - Tập 4 Số 1 - Trang 1-15 - 2023
Freely switching light transmission and absorption via an achromatic
reflectionless screen is highly desired for many photonic applications (e.g.,
energy-harvesting, cloaking, etc.), but available meta-devices often exhibit
reflections out of their narrow working bands. Here, we rigorously demonstrate
that an optical metasurface formed by two resonator arrays coupled vertically
can be perfectly re...
Multifocal displays: review and prospect
PhotoniX - Tập 1 - Trang 1-31 - 2020
Conventional stereoscopic three-dimensional displays suffer from vergence-
accommodation conflict because the stimulus to accommodation is fixed by the
display panel and viewing optics, but that to vergence changes with image
contents. With the recent rapid development of head-mounted displays, several
methods have been proposed to offer the accommodation cues, among which
multifocal display techn...
Planar metasurface-based concentrators for solar energy harvest: from theory to engineering
PhotoniX - Tập 3 - Trang 1-35 - 2022
Solar energy is an inexhaustible renewable energy resource, which is a potential
solution to global warming and aids sustainable development. The use of
solar-thermal collectors to harness solar energy facilitates low-cost heat
storage and can improve the stability of power grids based on renewable energy.
In solar-thermal collectors, traditional concentrators, such as parabolic
troughs and dishes...
Tolerance analysis of non-depolarizing double-pass polarimetry
PhotoniX - Tập 1 - Trang 1-20 - 2020
Double-pass polarimetry measures the polarization properties of a sample over a
range of polar angles and all azimuths. Here, we present a tolerance analysis of
all the optical elements in both the calibration and measurement procedures to
predict the sensitivities of the double-pass polarimeter. The calibration
procedure is described by a Mueller matrix based on the eigenvalue calibration
method ...
Vacuum-ultraviolet photodetectors
PhotoniX - - 2020
Abstract High-performance vacuum-ultraviolet (VUV) photodetectors are of great
significance to space science, radiation monitoring, electronic industry and
basic science. Due to the absolute advantages in VUV selective response and
radiation resistance, ultra-wide bandgap semiconductors such as diamond, BN and
AlN attract wide interest from researchers, and thus the researches on VUV
photodetector...
High-dimensional Poincaré beams generated through cascaded metasurfaces for high-security optical encryption
PhotoniX - Tập 5 Số 1
AbstractOptical encryption plays an increasingly important role in the field of
information security owing to its parallel processing capability and low power
consumption. Employing the ultrathin metasurfaces in optical encryption has
promoted the miniaturization and multifunctionality of encryption systems.
Nevertheless, with the few number of degrees of freedom (DoFs) multiplexed by
single metas...
Chip-to-chip optical multimode communication with universal mode processors
PhotoniX - Tập 4 Số 1
AbstractThe increasing amount of data exchange requires higher-capacity optical
communication links. Mode division multiplexing (MDM) is considered as a
promising technology to support the higher data throughput. In an MDM system,
the mode generator and sorter are the backbone. However, most of the current
schemes lack the programmability and universality, which makes the MDM link
susceptible to t...
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