Occurrence control of charged exciton for a single CdSe quantum dot at cryogenic temperatures on an optical nanofiber
| Autor: | Iida Kazunori, Tsutsumi Emi, Kohzo Hakuta, Akiharu Miyanaga, K. Muhammed Shafi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Exciton General Physics and Astronomy Physics::Optics FOS: Physical sciences 01 natural sciences 010309 optics 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Quantum Quantum optics Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics business.industry General Engineering Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Core (optical fiber) Wavelength Quantum dot Nanofiber Optoelectronics Photonics business Quantum Physics (quant-ph) |
| DOI: | 10.48550/arxiv.2003.10619 |
| Popis: | We discuss photo-luminescence characteristics of CdSe core/shell quantum dots at cryogenic temperatures using a hybrid system of a single quantum dot and an optical nanofiber. The key point is to control the emission species of quantum dot to charged excitons, known as trions, which have superior characteristics to neutral excitons. We investigate the photocharging behavior for the quantum dots by varying the wavelength and intensity of irradiating laser light, and establish a method to create a permanently charged situation which lasts as long as the cryogenic temperature is maintained. The present photocharging method may open a new route to applying the CdSe quantum dots in quantum photonics, and the hybrid system of photocharged quantum-dot and optical nanofiber may readily be applicable to a fiber-in-line single-photon generator. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|