Tunable single-photon emitters in 2D materials
Single-photon emitters (SPEs) hold the key to many quantum technologies including quantum computing. In particular, developing a scalable array of identical SPEs can play an important role in preparing single photons – crucial resources for computation – …
Contrast-enhanced near-infrared photoacoustic microscopy and optical coherence tomography imaging of rat fundus
In this paper, we design a multimodal visible/near-infrared photoacoustic microscopy and optical coherence tomography (VIS/NIR-PAM-OCT) system for imaging both retina and retinal pigment epithelium (RPE)/choroid complex layer. F127 and DSPE-PEG-cRGD …
Digital-SMLM for precisely localizing emitters within the diffraction limit
Precisely pinpointing the positions of emitters within the diffraction limit is crucial for quantitative analysis or molecular mechanism investigation in biomedical research but has remained challenging unless exploiting single molecule localization …
Fast and broadband spatial-photoresistance modulation in graphene–silicon heterojunctions
Different types of devices with modulable resistance are attractive for the significant potential applications such as sensors, information storage, computation, etc. Although extensive research has been reported on resistance effects, there is still a need …
Scaling up multispectral color filters with binary lithography and reflow (BLR)
Efforts to increase the number of filters are driven by the demand for miniaturized spectrometers and multispectral imaging. However, processes that rely on sequential fabrication of each filter are cost ineffective. Herein, we introduce an approach to …
Thermo-responsive circularly polarized luminescence from carbon quantum dots in a cellulose-based chiral nematic template
Circularly polarized light emitting active materials are of great interest, and the convenient tuning of the circularly polarized luminescence (CPL) remains a significant challenge. Integrating fluorescent materials into chiral photonic crystals to achieve …
Magneto-plasmonic “switch” device for magnetic field detection
This paper introduces a novel class of low-loss and cost-effective optical planar structures tailored for magnetic detection applications. These structures represent unconventional magneto-plasmonic devices specifically optimized for an ‘optical switch’ …
Quantitative measurement of spatial distribution of effective refractive index induced by local electron concentration at a nano slit
Surface plasmon polaritons (SPPs) have found their key applications in high-sensitivity biomolecular detection and integrated photonic devices for optical communication via light manipulation at nanostructures. Despite their broad utility, SPPs are known to …
Single femtosecond laser pulse–induced valence state conversion in BaFCl: Sm^3+ nanocrystals for low-threshold optical storage
Femtosecond laser-induced valence state conversion (VC) in solid materials has attracted significant research attention due to its potential application in ultra-high density optical storage, boasting advantages such as ultra-high recording speed, easy …
Chip-encoded high-security classical optical key distribution
The information security plays a significant role in both our daily life and national security. As the traditional algorithm-based secure key distribution (SKD) is challenged by the quantum computers, the optical physical-layer SKD has attracted great …
Topological valley-locked waveguides with C_4 impurity
Heterostructures play a pivotal role in the design of valley-locked waveguides, facilitating the manipulation of width as an additional degree of freedom. Through this design, we demonstrate the extension of the topological guided modes from the domain wall …
Reconfigurable metasurface array for diverse retrodirective reflections and radar cross section reduction
Retroreflectors can scatter the arbitrarily incident wave back to incoming direction, demonstrating great potential in wireless communication. However, there are limitations in adaptive retroreflection and polarization modulation with the existing …
Multilayer all-dielectric metasurfaces expanding color gamut
Structural color, arising from the interaction between nanostructures and light, has experienced rapid development in recent years. However, high-order Mie resonances in dielectric materials often induce unnecessary sub-peaks, particularly at shorter …