Here, a simple four-band terahertz tunable narrowband absorber is proposed, which can
achieve multimodal perfect absorption within 1–9 THz. We analyzed the physical …

All-optical modulation yields the promise of high-speed information processing. In this field,
metasurfaces are rapidly gaining traction as ultrathin multifunctional platforms for light …

Structural symmetry plays a pivotal role in the emergence of symmetry-protected bound
states in the continuum (BICs), often observed at the Γ-point within the first Brillouin zone …

Nonlinear dielectric metasurfaces provide a promising approach to control and manipulate
frequency conversion optical processes at the nanoscale, thus facilitating both advances in …

Infrared band occupies a very important position in the electromagnetic wave band.
Traditional infrared devices use the inherent properties of natural materials to achieve the …

High-refractive-index nanostructures offer versatile opportunities for nonlinear optical effects,
due to their ability to strongly confine field into a subwavelength scale. Herein, we propose a …

This chapter reviews the physics and applications of nonlinear processes in resonant
dielectric nanostructures. The focus is placed on the nonlinear phenomena stemming from …

Nanophotonic structures have shown promising routes to controlling and enhancing
nonlinear optical processes at the nanoscale. However, most nonlinear nanostructures …

Bound states in the continuum (BICs) provide a powerful way to enhance the nonlinear
properties of materials, epsilon-near-zero (ENZ) materials are considered as promising …

This work examines a symmetry-protected bound state in the continuum (BIC) supported
unique all-dielectric dome-shaped metasurface (MS). The simple unit MS is made up of four …