Author(s): Wang, J (Wang, Jian); Huang, JH (Huang, Junhui); Li, YH (Li, Yuanhe); Ding, K (Ding, Kun); Jiang, DS (Jiang, Desheng); Dou, XM (Dou, Xiuming); Sun, BQ (Sun, Baoquan)

Source: APPLIED PHYSICS LETTERS Volume: 120 Issue: 24 Article Number: 242102 DOI: 10.1063/5.0088137 Published: JUN 13 2022

Abstract: We have obtained long lifetime exciton emission in an InGaAs/GaAs quantum well (QW) when the QW film is transferred onto a silicon substrate covered by Au nanoparticles. It is found that the exciton lifetime increases from 0.301 +/- 0.003 ns for the as-grown QW sample to 88 +/- 6 ns for a QW film with Au nanoparticles, i.e., the spontaneous decay rate is inhibited with a factor of 1/300. The experimental condition of observing long lifetime excitons is very sensitive to the separation distance z between the QW and Au nanoparticles because phase-related scattering field mainly occurs at kz similar to 1, where k is the wave vector. A classical dipole oscillator dynamic equation driven by the scattering field of Au nanoparticles can be employed to elucidate the experimental results. Published under an exclusive license by AIP Publishing.

Accession Number: WOS:000811429700002

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Li, Yuanhe                  0000-0003-2322-7219

ISSN: 0003-6951

eISSN: 1077-3118

Full Text: https://aip.scitation.org/doi/10.1063/5.0088137