Focusing light into a small spot is vital in many research and industrial fields. In principle, the
diffraction nature of light restricts the achievable size of a focal spot referred to as the …

An extraordinary resolution down to 50 microns is demonstrated for the first time for bulk
ultrasonics, using novel micro-fabricated metamaterial lenses. The development and …

For terahertz wave applications, such as medical imaging, space exploration, security
inspection etc., the lens is fundamental for use as the optical focusing element. Far-field …

The growth of the nanotechnology and intense studies on subwavelength nanophotonics
has facilitated research in the field of metamaterials and metasurfaces. Optical waveguides …

An optical needle is created using a radially polarized circular Airy beam with a conical
angle, stemmed from the auto-focusing property of light beams. The utilization of the angular …

This study presents an innovative inline metasurface design for selective wavelength
transmission and focusing. When integrated into optical fibers, it improves the stability and …

Far field superlensing of light has generated great attention in optical focusing and imaging
applications. The capability of metamaterials to convert evanescent waves to propagative …

In this paper, a mode decomposition (MD) method for degenerated modes has been
studied. Convolution neural network (CNN) has been applied for image training and …

Mode decomposition (MD) method for degenerated modes has been studied. Convolution
neural network (CNN) has been applied for image training and predicting mode coefficients …

This paper proposes a multifocal lens design method named phase superposition method
(PSM) and a methodology to increase the efficiency of metallic binary zone plates through a …