23 citations · 43 across the 5 of their papers we have counts for
5 papers
BIC lasing from first principles
Tetsuyuki Ochiai
One of the main applications of the bound state in the continuum (BIC) is the low-threshold lasing. Ideally, the infinite quality factor of the BIC results in the zero-threshold an…
Generation of multiple bound states in the continuum through doubly degenerate quasi-guided modes
Tetsuyuki Ochiai
We present a detailed theoretical analysis of a peculiar generation of multiple bound states in the continuum (BICs) in two-dimensional periodic arrays of dielectric spheres. They…
Degenerate spontaneous parametric down-conversion in nonlinear metasurfaces
Tetsuyuki Ochiai
We propose a simple scheme of degenerate spontaneous parametric down-conversion (SPDC) in nonlinear metasurfaces or photonic crystal slabs with quasi-guided modes. It employs a ban…
Field Theory on the von Neumann Lattice and the Quantized Hall Conductance of Bloch Electrons
K. Ishikawa, N. Maeda, T. Ochiai +1
We construct useful sets of one-particle states in the quantum Hall system based on the von Neumann lattice. Using the set of momentum states, we develop a field-theoretical formal…
Duality Relation among Periodic Potential Problems in the Lowest Landau Level
K. Ishikawa, N. Maeda, T. Ochiai +1
Using a momentum representation of a magnetic von Neumann lattice, we study a two-dimensional electron in a uniform magnetic field and obtain one-particle spectra of various period…