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Proceedings Paper

Spatio-temporal dynamics of excitons in semiconducting nanowires (Conference Presentation)
Author(s): Bongsu Kim; Ryan Khan; Alexander Fast; Eric O. Potma

Paper Abstract

Excitonic excitations play an important role in the optical response of low-dimension nanoscale semi-conducting materials. During its lifetime, excitons may diffuse or migrate in particular directions, thus constituting a form of excitation information transfer on the nanoscale. The details of the spatio-temporal evolution of excitons remain unclear, because it has been challenging to directly visualize this process with nanometer spatial resolution and femtosecond temporal resolution. Here we describe pump-probe measurements at the nanoscale, using the photo-induced force microscopy (PiFM) and near-field scanning optical microscopy (NSOM) at ambient conditions. We analyze the spatial and temporal characteristics of the excitons in quasi-1D semiconductor nanowires, and provide unprecedented views of their evolution.

Paper Details

Date Published: 14 March 2018
Proc. SPIE 10530, Ultrafast Phenomena and Nanophotonics XXII, 105300K (14 March 2018); doi: 10.1117/12.2290796
Show Author Affiliations
Bongsu Kim, Univ. of California, Irvine (United States)
Ryan Khan, Univ. of California, Irvine (United States)
Alexander Fast, Univ. of California, Irvine (United States)
Eric O. Potma, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 10530:
Ultrafast Phenomena and Nanophotonics XXII
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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