Optical Metasurfaces for Biomedical Imaging and Sensing

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Optical metasurfaces, arrays of nanostructures engineered to manipulate light, have emerged as a transformative technology in both research and industry due their compact design exceptional light control capabilities. Their strong light–matter interactions enable precise wavefront modulation, polarization control, significant near-field enhancements. These unique properties recently driven application biomedical fields. In particular, metasurfaces led breakthroughs imaging technologies, such achromatic imaging, phase extended depth-of-focus imaging. They also advanced cutting-edge biosensing featuring high-quality factor resonators As the demand for device miniaturization system integration increases, are expected play pivotal role development next-generation devices. this review, we explore latest advancements use applications, with particular focus on sensing. Additionally, discuss future directions aimed at transforming field by leveraging full potential provide compact, high-performance solutions wide range applications.

Language: Английский

Ultra-Narrowband Circular Dichroism in Chiral Nanopore Arrays Based on Bound States in the Continuum: Implications for Ultrasensitive Detection of Chiral Molecules

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Narrow-band (UN) circular dichroism (CD) is important in the fields of chiral molecular sensing, negatively refractive materials, and polarization-resolved imaging. However, designing structures with strong, ultra UN, dynamically tunable CD spectra remains challenging. In this paper, bound states continuum (BICs) magneto-optical (MO) materials are introduced into nanopores, hexagonal nanopore arrays (HCNAs). The simulation results show that HCNAs generate two UN signals infrared band when structural symmetry broken by introducing perturbation. intensities can be considerably enhanced adjusted an external magnetic field applied. enhancing mechanism explained quantum optical models, electric field, current distributions HCNAs. By altering geometrical characteristics HCNAs, impacts various parameters on were discussed. addition, sensing properties for ambient index molecules evaluated, figure merit (FOM) reach 23,398. These aid developing sensor systems provide opportunities signals. This signal high amplitude ultranarrow bandwidth provides good application prospects ultrasensitive detection molecules.

Language: Английский

Voltage-induced transparency of photonic crystal microcavity with chiral liquid crystal layer

Photonics and Nanostructures - Fundamentals and Applications, Journal Year: 2025, Volume and Issue: unknown, P. 101350 - 101350

Published: Jan. 1, 2025

Language: Английский