The dual beam picosecond continuum technique for measurement of short time-scale transmission spectra
Publication Type
Journal Article
Date Published
04/1998
Authors
DOI
Abstract
In this work, a dual-beam measurement technique is presented to measure the short-time-scale optical properties of novel materials. It is shown that the picosecond continuum probe source obtained from nonlinear interaction with H2O/D2O is highly variable and does not permit detection of small changes in absorption /transmission spectra. The dual-beam approach is proposed to allow simultaneous measurement of a sample's properties in both the excited and steady states. As an example, the technique is applied to the picosecond transmission spectrum of light-emitting porous silicon. Photo-induced absorption is observed at a level that could not be detected without the new technique.
Journal
Experimental Heat Transfer
Volume
11
Year of Publication
1998
Issue
4
Notes
LBNL-43857 NOT IN FILE