Room-temperature single photon emission from micron-long air-suspended carbon nanotubes

作     者：Ishii, A. Uda, T. Kato, Y.K. 

作者机构：Nanoscale Quantum Photonics Laboratory RIKEN Saitama351-0198 Japan Quantum Optoelectronics Research Team RIKEN Center for Advanced Photonics Saitama351-0198 Japan Department of Applied Physics University of Tokyo Tokyo113-8656 Japan 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2017年

核心收录：

主　　题：Chirality 

摘      要：Statistics of photons emitted by mobile excitons in individual carbon nanotubes are investigated. Photoluminescence spectroscopy is used to identify the chiralities and suspended lengths of airsuspended nanotubes, and photon correlation measurements are performed at room temperature on telecommunication-wavelength nanotube emission with a Hanbury-Brown-Twiss setup. We obtain zero-delay second-order correlation g(2)(0) less than 0.5, indicating single photon generation. Excitation power dependence of the photon antibunching characteristics is examined for nanotubes with various chiralities and suspended lengths, where we find that the minimum value of g(2)(0) is obtained at the lowest power. The inuence of exciton diffusion and end quenching is studied by Monte Carlo simulations, and we derive an analytical expression for the minimum value of g(2)(0). Our results indicate that mobile excitons in micron-long nanotubes can in principle produce high-purity single photons, leading to new design strategies for quantum photon sources. Copyright © 2017, The Authors. All rights reserved.