3 papers
physics.optics2025
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…
physics.optics2024
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…
physics.optics2023
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…