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HL: Fachverband Halbleiterphysik

HL 64: Poster II

HL 64.33: Poster

Donnerstag, 19. März 2020, 10:00–13:00, P1A

Sensing electrical fields in nanostructures via quantum dot luminescence — •Sofie Krietenstein and Georg Herink — Experimental Physics VIII, University of Bayreuth, Germany

Quantum dot luminescence can be modified in the presence of external electrical fields, particularly due to the Quantum-Confined-Stark-Effect.

In this contribution, we present a detection scheme for sensing local electrical fields in nanostructures via changes of luminescence spectra and lifetimes. Specifically, we employ the Dispersive Fourier Transform based on the group velocity dispersion of optical fibers to map spectral information to the temporal domain. We present measurements on colloidal quantum dots embedded in voltage-biased gold nanostructures using different detection schemes.