169 citations · 427 across the 7 of their papers we have counts for
7 papers
Low-Contrast BIC Metasurfaces with Quality Factors Exceeding 100,000
Keisuke Watanabe, Tadaaki Nagao, Masanobu Iwanaga
Dielectric metasurfaces operating at quasi-bound states in the continuum (qBICs) can achieve exceptionally high radiative quality () factors by introducing small asymme…
Vibrational coupling to quasi-bound states in the continuum under tailored coupling conditions
Keisuke Watanabe, Hemam Rachna Devi, Masanobu Iwanaga +1
Photonic resonance modes can be spectrally coupled to the vibrational modes of molecules in the mid-infrared regime through interactions between localized electric fields and nearb…
An On-Chip Quad-Wavelength Pyroelectric Sensor for Spectroscopic Infrared Sensing
Thang Duy Dao, Satoshi Ishii, Anh Tung Doan +4
Merging photonic structures and optoelectronic sensors into a single chip may yield a sensor-on-chip spectroscopic device that can measure the spectrum of matters. In this work, we…
Terahertz Faraday and Kerr rotation spectroscopy of BiSb films in high magnetic fields up to 30 Tesla
Xinwei Li, Katsumasa Yoshioka, Ming Xie +16
We report results of terahertz Faraday and Kerr rotation spectroscopy measurements on thin films of , an alloy system that exhibits a semimetal-to-top…
Dual-band in situ molecular spectroscopy using single-sized Al-disk perfect absorbers
Thang Duy Dao, Kai Chen, Tadaaki Nagao
In this manuscript, we have demonstrated that the antenna-enhanced infrared vibrational spectroscopy can be a powerful platform for high-sensitivity detection of ultrathin layer of…
Band engineering of ternary metal nitride system Ti1-x ZrxN for plasmonic applications
Mukesh Kumar, Satoshi Ishii, Naoto Umezawa +1
Chemical composition is the primary factor that determines the electronic band structure and thus also influences the optical properties of plasmonic ceramics including nitrides an…
Examining the performance of refractory conductive ceramics as plasmonic materials: a theoretical approach
Mukesh Kumar, Naoto Umezawa, Satoshi Ishii +1
The main aim of this study is to scrutinize promising plasmonic materials by understanding their electronic structure and correlating them to the optical properties of selected ref…