Hexagonal boron nitride nanophotonics: a record-breaking material for the ultraviolet and visible spectral ranges

Abstract

A global trend towards miniaturization and multiwavelength performance of nanophotonics drives research on novel phenomena as well as surveys for high-refractive index and strongly anisotropic materials and metasurfaces, where hBN has a central role.

Efficient Preparation of Hydrophilic Boron Nitride Nanosheets for Human Heat Dissipation Applications

“…The residual mass of p-BNNSs is 97.9%, which indicates that the hydroxyl grafting rate is 2.1% after exfoliation and functionalization of p-BNNSs . Finally, the UV absorption properties of h-BN and p-BNNSs were tested (Figure i); as we can see from the figure, p-BNNSs have significantly improved UV absorption properties compared to h-BN, with good absorption properties in the whole UV band. The above data analysis provides strong and valuable evidence that p-BNNSs have been exfoliated into boron nitride nanosheets with fewer layers and successfully grafted with hydroxyl functional groups for the functionalization of p-BNNSs.…”

Optical Nanoimaging of Surface Plasmon Polaritons Supported by Ultrathin Metal Films

“…The shift of FT peak from the actual mode is described by the following relationship: , n eff = n obs − cos ( α ) nobreak0em0.25em⁡ sin ( β ) where n eff is the effective index of the guided plasmonic modes, n obs is the effective index of the modes observed in the experiment, α = 45° is the angle between the illumination wave vector and its projection onto the surface plane sample, and β is the angle between the projections of the wave vector and the edges of the crack in the Au film.…”

“…The shift of FT peak from the actual mode is described by the following relationship: 52,53 n n cos( ) sin( ) eff obs…”

(C5H6.16N2Cl0.84)(IO2Cl2): a birefringent crystal featuring unprecedented (IO2Cl2)− anions and π-conjugated organic cations

“…: 0.664 at 546 nm). [9][10][11] However, Cd(H 2 C 6 N 7 O 3 ) 2 $8H 2 O suffers from low thermal stability (85 °C), and SnPO 4 I (band gap: 2.45 eV) shows a limited visible transparency window. The birefringence of Cd(H 2 C 6 N 7 -O 3 ) 2 $8H 2 O and SnPO 4 I arises from the p-conjugated (H 2 C 6 N 7 O 3 ) − groups and SCALP Sn(II)-based groups, respectively.…”