Direct Imaging of the Carrier Capture into Individual InP Quantum Dots of a Semiconductor Disk Laser Membrane

Autor:	Frank Bertram, Gordon Schmidt, Julie Kernchen, Peter Veit, Hannes Schürmann, Ana Ćutuk, Michael Jetter, Peter Michler, Jürgen Christen
Rok vydání:	2022
Předmět:	General Engineering General Physics and Astronomy General Materials Science
Zdroj:	ACS Nano. 16:4619-4628
ISSN:	1936-086X 1936-0851
DOI:	10.1021/acsnano.1c11260
Popis:	We report on nanoscopic exploration of the luminescence from individual InP quantum dots (QDs) by means of highly spatially resolved cathodoluminescence (CL) spectroscopy directly performed in a scanning transmission electron microscope (STEM). A 7-fold layer stack with high-density InP quantum dots is embedded as an active medium membrane in an external-cavity surface-emitting laser. We characterize the vertical transfer of carriers within the periodic separate confinement heterostructure and determine the capture efficiency of carriers from the cladding layer into the quantum dot layers. Benefiting from the nanoscale resolution of our STEM-CL, we perform single-dot spectroscopy on single isolated QDs in the STEM lamella resolving the details of the excitonic structure of individual quantum dots. Executing highly spatially resolved spectrum line scans within the QD layers, we directly visualize the lateral transport
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afea1bb48bc2538a3956d43c2a3bb259 https://doi.org/10.1021/acsnano.1c11260 Zobrazit plný text záznamu