Session Index

We report the observation of a time-domain hypersound anomaly at the n-GaN/hexane interface producing advancing phenomenon in the hypersonic echo detected with ultra-high-resolution femtosecond photoacoustics. We attribute this anomaly to the absorbed water layer on the hydrophilic surface.

 

Physical sum rules as well as material dispersion relation have cracked the existence of broadband invisible designs for all proposed solutions. Her we provide an alternative approach to overcome these constraints via external waves excitation.
Under proper multi-input waves, we can create the sources of multi-channels zeros, leading to invisibility.

 

This work enriches the thermodynamically stable lattice structure of blue phase liquid crystal (BPLC) by non-cubic lattices. A thorough examination is performed to indicate the existence of the stable non-cubic BPLC. Moreover, the noncubicity of the blue-phase lattice can be determined by varying the duration or intensity of applied fields.

 

A novel waveguide clamps design is proposed and integrated with 1D photonic crystal (PhC) tunable nanolasers in polydimethylsiloxane for locally enhancing the strain. The enlarged wavelength tunability under compressive and stretching strain can provide further optimization and possibilities for different tunable PhC devices in soft photonic circuits.

 

A waveguide-fed metasurface is demonstrated to be with a tunable phase modulation ability from 100 deg to -100 deg by simply tuning the waveguide thickness from 6 mm to 6.8 mm at wavelength = 13.34 mm. This device can be applied for active beam steering device for mmWave and microwave.

 

We report a new kind of liquid crystal lens that has sufficient tunable range and a diameter of 12-mm, which is appropriate for vision applications. Using Fresnel-patterned 3D electrodes, we design a liquid crystal lens with more optical power than conventional hole-patterned liquid crystal lenses.

 

In this study, the design and simulation of gradient photonic crystal slot nanobeams is presented. By changing the surrounding fluids with different refractive indices, the offsets of the resonance wavelengths can be evaluated for fluid sensing. Our results provide a reference for the design and development of photonic crystal sensors.