Highly-excited Rydberg excitons in synthetic thin-film cuprous oxide

J DeLange, K Barua, AS Paul, H Ohadi, V Zwiller… - Scientific Reports, 2023 - nature.com
Cuprous oxide (Cu 2 O) has recently emerged as a promising material in solid-state
quantum technology, specifically for its excitonic Rydberg states characterized by large …

Bayesian hamiltonian selection in x-ray photoelectron spectroscopy

Y Mototake, M Mizumaki, I Akai… - Journal of the Physical …, 2019 - journals.jps.jp
Core-level X-ray photoelectron spectroscopy (XPS) is a useful measurement technique for
investigating the electronic states of a strongly correlated electron system. Usually, to extract …

Bayesian spectroscopy in solid-state photo-physics

I Akai, K Iwamitsu, M Okada - Journal of Physics: Conference …, 2018 - iopscience.iop.org
We propose Bayesian spectroscopy (BS) both for the spectral analyses of optical spectra
and for normal mode analyses of coherent phonon (CP) signals in solid-state materials. In …

High-throughput XPS spectrum modeling with autonomous background subtraction for 3d5/2 peak mapping of SnS

T Matsumura, N Nagamura, S Akaho… - … and Technology of …, 2023 - Taylor & Francis
We propose a fitting model that automatically conducts the background subtraction during
high-throughput peak fitting. The fitting model consists of the pseudo-Voigt mixture model …

Spectral Analysis of X‐Ray Absorption Near Edge Structure in α‐Fe2O3 Based on Bayesian Spectroscopy

K Iwamitsu, T Yokota, K Murata… - … status solidi (b), 2020 - Wiley Online Library
A Bayesian spectroscopy technique is proposed to decompose weak pre‐edge structures
from an X‐ray absorption near edge structure (XANES) spectrum. This methodology can …

Spectral decomposition of components weaker than noise intensity by bayesian spectroscopy

K Iwamitsu, M Okada, I Akai - Journal of the Physical Society of …, 2020 - journals.jps.jp
Using Bayesian spectroscopy, we have performed model selection to extract weak spectral
components from an absorption spectrum of a Cu2O thin crystal sandwiched between a pair …

Multivariate temperature-series analysis of stress-induced ferroelectricity in SrTiO3: a machine learning approach with K-shape clustering and hierarchical Bayesian …

H Manaka, K Toyoda, Y Miura - Science and Technology of …, 2024 - Taylor & Francis
ABSTRACT A new machine learning approach that transforms time-series analysis into
temperature-series analysis is introduced to analyze stress-induced ferroelectricity in SrTiO …

[HTML][HTML] Bayesian spectroscopy of admixed photoluminescence spectra with exciton, biexciton and electron hole droplet states in a GaAs/AlAs type-ii superlattice

K Iwamitsu, Y Furukawa, M Nakayama, M Okada… - Journal of …, 2018 - Elsevier
We have analyzed a photoluminescence (PL) spectrum in a GaAs/AlAs type-II superlattice
and have statistically confirmed stable existence of an electron-hole droplet (EHD) state …

Superradiance-to-Polariton Crossover of Wannier Excitons with Multiple Resonances

M Takahata, K Tanaka, N Naka - Physical Review Letters, 2018 - APS
We demonstrated the superradiance-to-polariton crossover of the blue excitons in Cu 2 O by
varying the sample thicknesses instead of controlling the cavity quality factor. The crossover …

[HTML][HTML] High precision modeling of a damped oscillation in coherent phonon signals by Bayesian inference

S Aihara, M Hamamoto, K Iwamitsu, M Okada, I Akai - AIP Advances, 2017 - pubs.aip.org
By Bayesian inference with Metropolis algorithm, we have succeeded highly accurate
estimation of a vibrational frequency as well as an initial phase for a damped oscillation …