Biodegradable air filter with electrospun composite nanofibers and cellulose fibers dual network: Enhanced electrostatic adsorption, humidity resistance, and extended service life.

Cellulose-based materials have great potential as degradable air filters. Regretfully, the application is limited by their low electrostatic adsorption and hydrophilicity. To meet with the challenge, we designed a composite air filter with dual network.

Laser stripping of functional coatings on glass fiber reinforced plastic substrate.

Glass fiber reinforced plastic (GFRP) with functional coatings is applied more and more in aircraft, thanks to its light weight and excellent mechanical properties. However, the outermost coating must be removed duo to discoloration, paint dropping, cracking, pits, or other fatigued phenomena after a certain amount of service time. The outermost torn coating on a GFRP material is successfully stripped with a nanosecond laser source.

Highly uniform parallel scribing inside transparent materials with ultrafast lasers: from 2D to 3D.

Micromachining uniform features inside transparent materials is of great importance. The generation of highly uniform parallel laser beams based on spatial light modulators is a valid way to realize it. A movable magnifying optical feedback approach is proposed.

Comparison of the sensitivity by SPR in a metal-ITO-BlueP/TMDC structure.

A surface plasmon resonance (SPR) sensor based on blue phosphorus (BlueP)/transition metal dichalcogenides (TMDCs) of two-dimensional (2D) materials is proposed to increase the performance. In this sensor, BlueP/TMDCs are coated on indium tin oxide (ITO) and different metals (Au/Ag/Cu) to improve the sensitivity. By optimizing structural parameters, with the / monolayer and Au thin film, the angular sensitivity can reach as high as 226.

Design and analysis of a compact subwavelength-grating-assisted 1.55/2 µm wavelength demultiplexer.

The wavelength demultiplexer (deWMUX) is an indispensable component for the wavelength diversity system. In this paper, we propose a subwavelength-grating-assisted ${{1}} \times {{2}}$ deWMUX based on the principle of multimode interference, which aims to output 1.55 and 2 µm wavelengths from two different channels.

Variable single-passband narrowband optical filter based on forward stimulated interpolarization scattering in photonic crystal fiber.

A variable transmission spectrum single-passband narrowband optical filter is proposed and experimentally demonstrated. It is based on forward stimulated interpolarization scattering (SIPS) in a photonic crystal fiber by applying a differential quadrature phase-shift keying modulation to the pump wave to broaden and shape the SIPS gain spectrum. By choosing the bit rate of the modulation data pattern, a flat-top steep-cutoff optical bandpass filter with a 3 dB bandwidth of 70 MHz and a 10 dB bandwidth of 90 MHz is realized.