Near-field optical imaging of transient absorption dynamics in organic nanocrystals

Yuzhen Shen, Tzu Chau Lin, Jianming Dai, Przemyslaw Markowicz, Paras N. Prasad

Research output: Contribution to journalLetterpeer-review

11 Scopus citations

Abstract

Collection-mode near-field scanning optical microscopy is combined with femtosecond two-color pump-probe spectroscopy to study the transient absorption dynamics in organic crystals. The temporal evolution of the variation in the nonlinear transmittance of nanostructures is mapped with a spatial resolution of 200 nm and temporal resolution of 150 fs. Near-field time-resolved measurements indicate a nonradiative energy transfer from the excited molecules to the metal coating of a near-field probe.

Original languageEnglish
Pages (from-to)13551-13553
Number of pages3
JournalJournal of Physical Chemistry B
Volume107
Issue number49
DOIs
StatePublished - 11 Dec 2003

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