365 citations · 847 across the 7 of their papers we have counts for
7 papers
Vacuum Rabi spectra of a single quantum emitter
Yasutomo Ota, Ryuichi Ohta, Naoto Kumagai +2
We report the observation of the vacuum Rabi splitting of a single quantum emitter by measuring its direct spontaneous emission into free space. We used a semiconductor quantum dot…
Spontaneous two photon emission from a single quantum dot
Y. Ota, S. Iwamoto, N. Kumagai +1
Spontaneous two photon emission from a solid-state single quantum emitter is observed. We investigated photoluminescence from the neutral biexciton in a single semiconductor quantu…
Zero-cell photonic crystal nanocavity laser with quantum dot gain
Masahiro Nomura, Yasutomo Ota, Naoto Kumagai +2
We demonstrate laser oscillation in a hexagonal-lattice photonic crystal nanocavity using an InGaAs quantum dot gain material by optical pumping at 5 K. The cavity comprises a defe…
Circularly-Polarized Light Emission from Semiconductor Planar Chiral Photonic Crystal
Kuniaki Konishi, Masahiro Nomura, Naoto Kumagai +3
We proposed and demonstrated a scheme of surface emitting circularly polarized light source by introducing strong imbalance between left- and right-circularly polarized vacuum fiel…
Impact of electron-phonon interactions on quantum-dot cavity quantum electrodynamics
Y. Ota, S. Iwamoto, N. Kumagai +1
Semiconductor quantum dots (QDs) in photonic nanocavities provide monolithic, robust platforms for both quantum information processing and cavity quantum electrodynamics (QED). An…
Investigation of the spectral triplet in strongly coupled quantum dot-nanocavity system
Yasutomo Ota, Naoto Kumagai, Shunsuke Ohkouchi +6
We experimentally investigated the excitation power dependence of a strongly coupled quantum dot (QD)-photonic crystal nanocavity system by photoluminescence (PL) measurements. At…