128 citations · 283 across the 13 of their papers we have counts for
14 papers
Sector-Resolved Winding Selection Rules for Structured-Light-Driven dc Currents
Tomohiro Tamaya, Kenichi L. Ishikawa
Structured light can generate electronic dc currents with azimuthal winding, yet the rules governing their winding order remain unclear. Here we identify sector-resolved windin…
Light-induced inverse spin Hall effect and field-induced circular photogalvanic effect in GaAs revealed by two-dimensional terahertz Fourier analysis
Tomohiro Fujimoto, Yuta Murotani, Tomohiro Tamaya +7
The electromotive force transverse to a bias field under irradiation of circularly polarized light, namely the photovoltaic Hall response or light-induced anomalous Hall effect, ha…
What is a proper definition of spin current? -- Lessons from the Kane-Mele Model
Tomohiro Tamaya, Takeo Kato, Takahiro Misawa
Spin current, a key concept in spintronics that carries spin angular momentum, has a non-unique definition due to the non-conservation of spins in solids. While two primary definit…
Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection
Tomohiro Fujimoto, Takayuki Kurihara, Yuta Murotani +7
We report the first observation of the spin Hall conductivity spectrum in GaAs at room temperature. Our terahertz polarimetry with a precision of several rads resolves the Farad…
Shear-Strain Controlled High-Harmonic Generation in Graphene
Tomohiro Tamaya, Hidefumi Akiyama, Takeo Kato
We propose a novel method for controlling the high-harmonic generation (HHG) with a high dynamic range in single-layer graphene. We find that, by utilizing shear strain, a signific…
Piezo-optic effect of high-harmonic generation in semiconductors
Tomohiro Tamaya, Takeo Kato
We theoretically investigate the piezo-optic effect of high-harmonic generation (HHG) in shear-strained semiconductors. By focusing on a typical semiconductor, GaAs, we show that t…
High-harmonic generation in GaAs beyond the perturbative regime
Peiyu Xia, Tomohiro Tamaya, Changsu Kim +6
We experimentally study the field-intensity dependence of high-harmonic generation in bulk gallium arsenide in reflection geometry. We find the oscillatory behavior at high fields…
Sub-band picture of high-harmonic generation in solids
Tomohiro Tamaya, Takeo Kato
We propose a novel picture of high-harmonic generation (HHG) in solids based on the concept of temporally changing band structures. To demonstrate the utility of this picture, we f…
Surface plasmon polaritons in thin-film Weyl semimetals
Tomohiro Tamaya, Takeo Kato, Satoru Konabe +1
We theoretically investigate surface plasmon polaritons propagating in the thin-film Weyl semimetals. We show how the properties of surface plasmon polaritons are affected by hybri…
Detuning dependence of high-order harmonic generation in monolayer transition metal dichalcogenides
Tomohiro Tamaya, Satoru Konabe, Shiro Kawabata
We theoretically investigate detuning-dependent properties of high-order harmonic generation (HHG) in monolayer transition metal dichalcogenides (TMDCs). In contrast to HHG in conv…
Orientation dependence of high-harmonic generation in monolayer transition metal dichalcogenides
Tomohiro Tamaya, Satoru Konabe, Shiro Kawabata
We theoretically investigate the orientation dependence of high-harmonic generation (HHG) in monolayer transition metal dichalcogenides (TMDCs). We find that, unlike conventional s…
Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields
T. Tamaya, A. Ishikawa, T. Ogawa +1
We theoretically investigate mechanisms of higher-order harmonic generation in solid-state materials under a high-intensity ac electric field. A new theoretical framework presented…
Higher-Order Harmonic Generation caused by Elliptically Polarized Electric Fields in Solid-State Materials
T. Tamaya, A. Ishikawa, T. Ogawa +1
We theoretically investigated the dependence of higher-order harmonic generation (HHG) in solid-state materials on the ellipticity of the electric field. We found that in the multi…
Time-resolved observation of coherent excitonic nonlinear response with a table-top narrowband THz pulse wave
K. Uchida, H. Hirori, T. Aoki +9
By combining a tilted-pulse-intensity-front scheme using a LiNbO3 crystal and a chirped-pulse-beating method, we generated a narrowband intense terahertz (THz) pulse, which had a m…