263 citations
- The University of TokyoJP22 papers
- Tokyo Metropolitan UniversityJP17 papers
- Czech Academy of Sciences, Nuclear Physics InstituteCZ15 papers
- High Energy Accelerator Research OrganizationJP14 papers
- Czech Technical University in PragueCZ13 papers
- Kyoto UniversityJP13 papers
- Hokkaido UniversityJP11 papers
- Institute of Particle and Nuclear Studies10 papers
- Czech Academy of SciencesCZ9 papers
- RIKENJP8 papers
- Centre National de la Recherche ScientifiqueFR7 papers
- Saitama UniversityJP6 papers
6 papers · 1 filter
Dual terahertz frequency combs for photonic RF readout of refractive index sensing with frequency multiplication and active-dummy temperature compensation
Masayuki Higaki, Yoshiaki Nakajima, Shuji Taue +4
We present a unified refractive index (RI) sensing platform that integrates THz-comb-based frequency multiplication with dual-comb active-dummy temperature compensation. In convent…
Single-pixel edge enhancement of object via convolutional filtering with localized vortex phase
Jigme Zangpo, Hirokazu Kobayashi
Microscopy is an essential tool in imaging research, and the edge-enhanced microscope by using the vortex filter is of particular interest as an optical information processing that…
Isolation of phase edges using off-axis q-plate filters
Jigme Zangpo, Hirokazu Kobayashi
Edge-enhanced microscopes with q-plate have been attracted more attention to enhance the edges of phase-amplitude objects in biological sample due to their capability for all-direc…
Edge-Enhanced Microscopy of Comlplex Object using Scalar and Vectorial Vortex Filtering
Jigme Zangpo, Tomohiro Kawabe, Hirokazu Kobayashi
Recently, system containing a q-plate has been used to perform edge detection and enhancement of amplitude and phase objects. However, only few studies have concentrated on ed…
Integer Multiplier for Orbital Angular Momentum of Light using Circular-Sector Transformation
Satoru Takashima, Hirokazu Kobayashi, Katsushi Iwashita
This paper describes an integer multiplier for the orbital angular momentum (OAM) of light through the parallel implementation of multiple circular-sector transformations, whereby…
Helical mode conversion using conical reflector
H. Kobayashi, K. Nonaka, M. Kitano
In a recent paper, Mansuripur et al. [Phys. Rev. A 84, 033813 (2011)] indicated and numerically verified the generation of the helical wavefront of optical beams using a conical-sh…