2008/04/20 by Y. Murakami, Yoichi Murakami, J. Kono +1 · 1 citation
Materials Science · Physics and Astronomy · #Annihilation #Atomic physics #Biexciton #Carbon Nanotubes in Composites #Carbon nanotube #Condensed matter physics #Excitation #Exciton #Graphene research and applications #Materials science #Mechanical and Optical Resonators #Molecular physics #Nanotechnology #Nanotube #Optical properties of carbon nanotubes #Optoelectronics #Photoluminescence #Physics #Quantum mechanics #Saturation (graph theory) #Spectroscopy #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.102.037401
published as Physical Review Letters 102, 037401 (2009) · 4 pages, 4 figures
arxiv created 2008/04/20 · openalex publication_date 2009/01/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have observed that photoemission from single-walled carbon nanotubes saturates in intensity as the excitation intensity increases. Each emission peak arising from specific-chirality tubes exhibited a saturation value independent of the excitation wavelength, suggesting an upper limit on the exciton density for each nanotube species. We developed a model based on diffusion-limited exciton-exciton annihilation, which allowed us to estimate exciton densities in the saturation regime. The estimated densities were found to be still substantially smaller than the expected Mott density.