Article / Chapter CC BY 4.0
Contrast of 83% in reflection measurements on a single quantum dot
We report on a high optical contrast between the photon emission from a single self-assembled quantum dot (QD) and the back-scattered excitation laser light. In an optimized semiconductor heterostructure with an epitaxially grown gate, an optically-matched layer structure and a distributed Bragg reflector, a record value of 83% is obtained; with tilted laser excitation even 885%. This enables measurements on a single dot without lock-in technique or suppression of the laser background by cross-polarization. These findings open up the possibility to perform simultaneously time-resolved and polarization-dependent resonant optical spectroscopy on a single quantum dot.
Could not load citation form.
Use and reproduction:This work may be used under a
Creative Commons Attribution 4.0 License (CC BY 4.0)