129 citations · 326 across the 8 of their papers we have counts for
8 papers
Formation of Organic Color Centers in Air-Suspended Carbon Nanotubes Using Vapor-Phase Reaction
D. Kozawa, X. Wu, A. Ishii +7
Organic color centers in single-walled carbon nanotubes have demonstrated exceptional ability to generate single photons at room temperature in the telecom range. Combining the col…
Near-unity radiative quantum efficiency of excitons in carbon nanotubes
H. Machiya, D. Yamashita, A. Ishii +1
The efficiencies of photonic devices are primarily governed by radiative quantum efficiency, which is a property given by the light emitting material. Quantitative characterization…
High efficiency dark-to-bright exciton conversion in carbon nanotubes
A. Ishii, H. Machiya, Y. K. Kato
We report that dark excitons can have a large contribution to the emission intensity in carbon nanotubes due to an efficient exciton conversion from a dark state to a bright state.…
Super-Resolution Fluorescence Imaging of Carbon Nanotubes Using a Nonlinear Excitonic Process
K. Otsuka, A. Ishii, Y. K. Kato
Highly efficient exciton-exciton annihilation process unique to one-dimensional systems is utilized for super-resolution imaging of air-suspended carbon nanotubes. Through the comp…
Organic molecular tuning of many-body interaction energies in air-suspended carbon nanotubes
S. Tanaka, K. Otsuka, K. Kimura +4
We investigate adsorption effects of copper phthalocyanine molecules on excitons and trions in air-suspended carbon nanotubes. Using photoluminescence excitation spectroscopy, we o…
Enhanced single photon emission from carbon nanotube dopant states coupled to silicon microcavities
A. Ishii, X. He, N. F. Hartmann +4
Single-walled carbon nanotubes are a promising material as quantum light sources at room temperature and as nanoscale light sources for integrated photonic circuits on silicon. Her…