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Ultra-compact nonvolatile phase shifter based on electrically reprogrammable transparent phase change materialsAbstract Optical 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 stat... ...
PhotoniX -
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 photodetectorsAbstract
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 researcher... ...
PhotoniX - - 2020
High-dimensional Poincaré beams generated through cascaded metasurfaces for high-security optical encryptionAbstract Optical 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 (... ...
PhotoniX - Tập 5 Số 1
Chip-to-chip optical multimode communication with universal mode processorsAbstract The 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 ma... ...
PhotoniX - Tập 4 Số 1
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