158 citations · 709 across the 28 of their papers we have counts for
28 papers
Stationary Two-State System in Optics using Layered Materials
Ken-ichi Sasaki
In scenarios where electrons are confined to a flat surface, such as graphene, quantizing electrodynamics reveals intriguing insights. We find that one of Maxwell's equations manif…
Introducing Corrections to the Reflectance of Graphene by Light Emission
Ken-ichi Sasaki, Kenichi Hitachi, Masahiro Kamada +3
Monolayer graphene absorbs 2.3 percent of the incident visible light. This 'small' absorption has been used to emphasize the visual transparency of graphene, but it in fact means t…
Band Structures of Edge Magnetoplasmon Crystals
Ken-ichi Sasaki
A two-dimensional electron gas in a static external magnetic field exhibits two distinct collective excitation modes. The lower frequency mode propagates along the periphery of the…
Layered Dynamical Conductivity for a Transfer Matrix Method -- Application to an N-layer Graphene
Ken-ichi Sasaki
We calculated the optical properties of an -layer graphene by formulating the dynamical conductivity of each layer. This is the conductivity when an electromagnetic field is loc…
Suppression of Gate Screening on Edge Magnetoplasmons by Highly Resistive ZnO Gate
N. Kumada, N. -H. Tu, K. -i. Sasaki +5
We investigate a way to suppress high-frequency coupling between a gate and low-dimensional electron systems in the gigahertz range by measuring the velocity of edge magnetoplasmon…
Massive Dirac Fermions Signal in Raman Spectrum of Graphene
Ken-ichi Sasaki
Massless Dirac fermions in graphene can acquire a mass through different kinds of sublattice-symmetry-breaking perturbations, and there is a growing need to determine this mass usi…