Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Ultrafast nonlinear spectroscopy of individual quantum dots: imaging and coherent coupling

Kasprzak, Jacek, Patton, Brian Robert and Langbein, Wolfgang Werner 2008. Ultrafast nonlinear spectroscopy of individual quantum dots: imaging and coherent coupling. Presented at: Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII, San Jose, CA, USA, 20-23 January 2008. Published in: Song, J. -J., Tsen, K. -T., Betz, M. and Elezzabi, A. Y. eds. Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII conference, 20-23 January 2008, San Jose, California, USA. Proceedings of the SPIE , vol. 6892. Bellingham, WA: SPIE, 68920Z. 10.1117/12.767661

Full text not available from this repository.

Abstract

We review our recent advances in four-wave mixing spectroscopy of individual semiconductor quantum dots using heterodyne spectral interferometry, a novel implementation of transient nonlinear spectroscopy allowing the study of the transient nonlinear polarization emitted from individual electronic transitions in both amplitude and phase. We present experiments on individual excitonic transitions localized in monolayer islands of a GaAs/AlAs quantum well. The detection of amplitude and phase allows the implementation of a twodimensional femtosecond spectroscopy, in which mutual coherent coupling of single quantum dot states can be observed and quantified. By combining two-dimensional femtosecond spectroscopy with four-wave mixing mapping in the real space we found coherent coupling between spatially separated excitons by up to ~ 0.8 μm.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: SPIE
ISBN: 9780819470676
ISSN: 0277-786X
Last Modified: 04 Jun 2017 03:49
URI: http://orca-mwe.cf.ac.uk/id/eprint/27502

Actions (repository staff only)

Edit Item Edit Item