Heat-assisted magnetic recording (HAMR) is a promising technology for improving the recording density of hard disk drives. A near-field transducer (NFT), which forms a small light spot on a recording medium, is necessary in HAMR. The authors’ group previously proposed a novel device, in which a metal nano-antenna acting as an NFT is attached to a semiconductor ring resonator acting as a light source

Nonlinear photoacoustic-based methods for measuring high-speed blood flow velocity typically use a single-pulse laser or a dual-pulse laser system with high repetition rate to achieve thermal tagging and acoustic excitation at the same time. However, the peak power of the pulsed laser is too high and can easily exceed the damage threshold, causing the blood to be overheated, which limits the application

An aerial 3D image formed by the use of a 3D-shaped light source gives a greater sense of reality compared to the conventional aerial 2D image. In particular, an aerial image of hollow face evokes a kind of illusion that the direction of the face changes depending on the viewing direction. In this study, we investigate the viewing zone of an aerial 3D display that employs a 3D object as a light source

Optical interconnection technology is the most promising solution for on-chip multi-core interconnection because of its advantages over electrical interconnection. To improve the performance of on-chip optical interconnection network architecture, a novel 5 × 5 full-duplex communication optical routing switch based on microring is proposed. A novel microring resonator switch formed by covering a layer

In this paper, based on a scale-adapted set of Laguerre-Gaussian modes, a theoretical model has been presented for evaluating the coupling efficiency of modes and mode crosstalk between different spatial modes caused by transverse offset and angular misalignments. A proof-of-model demonstration is performed for three-mode fiber, and the results show that the coupling efficiency and mode crosstalk of

In this paper, we revealed that the pseudo-3D perception of a 2D aerial image is increased by reducing the luminance and contrast of the background pattern, and by adding image movement that changes the shape and shading of the aerial image. In recent years, aerial images are used in our daily lives as entertainment, aerial touch panels etc. Most of them are 2D aerial images, but we sometimes perceive

The purpose of this study is to apply digital image processing to original images acquired with common digital devices to generate the resulting images that are easy for the elderly to see without using colorimetric values. Therefore, we propose an image enhancement method to improve color visibility of digital images for the elderly, taking account of their color vision characteristics. The proposed

Terahertz imaging technology has been widely used in security inspections due to its ability to detect various concealed hazardous materials and the advantage of being harmless to the human body. However, limited by the terahertz imaging system, it is challenging to detect concealed objects due to hard samples and imbalanced categories caused by terahertz image quality. To solve these issues, we propose

Two technologies for improving image gaps and narrow viewing angle were applied to a space-saving compact aerial display with striped retro-reflector on a LED panel. The aerial image gaps created by the striped retro-reflector structure was smoothed by scrolling the images perpendicular to the stripe direction. The narrow viewing angle inherent to the compact aerial display was successfully improved