Light‐Driven Carbon‐Based Soft Materials: Principle, Robotization, and Application

Recently, light‐driven carbon‐based actuators are widely applied in robotic applications due to their efficient, fast response, and stable actuating performance. This review summarizes the principle actuating mechanism of carbon‐based actuators and focuses on the analysis of the robotization and application mechanisms. In addition, the challenges and...

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Recent Progress on Optoplasmonic Whispering‐Gallery‐Mode Microcavities

The latest progress in optoplasmonic whispering‐gallery‐mode (WGM) microcavities is presented. Fundamentals and advances of optoplasmonic modes are discussed, including surface‐plasmon‐polariton WGMs, hybrid photon‐plasmon WGMs, and heterostructured metal‐dielectric WGMs. Coupling effects between localized surface plasmon resonances and WGMs are also...

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Hyperspectral Imaging and Optical Trapping: Complementary Tools for Assessing Direction‐Dependent Polarized Emission from Single Upconverting LiYF4:Yb3+/Er3+ Microparticles

Hyperspectral imaging and optical trapping are highly synergistic tools to assess photoluminescence at a single‐particle level. In this work, optical trapping and single‐particle polarized emission spectroscopy are leveraged to demonstrate that direction‐dependent polarized emission is a likely source of the spatial emission intensity variation exhibited...

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Progresses on Novel B‐Site Perovskite Nanocrystals

Lead‐free perovskites with various B‐site candidates exhibit different crystal structures due to the discrepant ionic structures of these B‐site elements. Most lead‐free perovskite nanocrystals can be obtained by three bottom‐up approaches: hot‐injection, ligand‐assisted re‐precipitation, and recrystallization. Bandgap, photoluminescence, and stability...

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Tunable Bulk Polymer Planar Bragg Gratings Electrified via Femtosecond Laser Reductive Sintering of CuO Nanoparticles

Tunable integrated photonics are of great interest for a multitude of research fields. This article demonstrates a novel concept for the fabrication of electro‐optic devices based on bulk polymer planar Bragg gratings and femtosecond laser reductive sintering of copper(II) oxide nanoparticles. Furthermore, performance and versatility of the proposed...

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Bright Single Photon Emission from Quantum Dots Embedded in a Broadband Planar Optical Antenna (Advanced Optical Materials 7/2021)

A planar metal–oxide–semiconductor structure, capable of beaming the photons emitted by epitaxial quantum dots into free space, has been designed and implemented by Huying Huang, Santanu Manna, Armando Rastelli and co‐workers (see article number 2001490). The structure is tolerant to fabrication imperfections and allows the photon outcoupling efficiency...

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Light‐Responsive Circularly Polarized Luminescence Polymers with INHIBIT Logic Function

The light‐responsive and luminescence‐tunable circularly polarized luminescence (CPL)‐active materials are synthesized by mixing achiral helical polymer containing vibration‐induced emission molecules and spiropyran with a chiral helical polymer. Based on the dynamic Förster resonance energy transfer, the multistimulus responsive CPL can serve as the...

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Ultrastable Perovskite Nanocrystals in All‐Inorganic Transparent Matrix for High‐Speed Underwater Wireless Optical Communication

Extremely stable CsPbBr3 nanocrystals in glass show enhanced radiative transition rates due to the large refraction index of the glass matrix. The composite has demonstrated high bandwidth up to 180 MHz and data transmitting speed up to 185 Mbps as well as long‐term water resistance for underwater wireless optical communication. Abstract The...

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Tailoring the Broadband Emission in All‐Inorganic Lead‐Free 0D In‐Based Halides through Sb3+ Doping

A strategy of Sb3+ doping is proposed for fine‐tuning the optical properties of 0D In‐based halides and the excited‐state dynamics of Sb3+ is unraveled through temperature‐dependent PL and femtosecond transient absorption spectroscopies. Through the control of monovalent cation and the octahedral unit, tunable Sb3+ emissions (490−750 nm) with quantum...

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Fast and High‐Resolution Ultrasound Pressure Field Mapping Using Luminescent Membranes

Acoustically produced luminescence (APL) employs a specially designed luminescent membrane to convert ultrasound pressure into visible light, producing cross sectional views of the acoustic beam many times faster than conventional hydrophone scanning. This paper demonstrates the ultrasonic heating mechanism behind the light generation, as well as the...

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