Title

Optical Properties And Coherent Vibrational Oscillations Of Gold Nanostars

Abstract

Hot electron relaxation and coherent vibrational oscillations of gold nanostars (AuNS) were studied using femtosecond laser spectroscopy. Transient profiles feature a fast decay attributed to electron-phonon interaction and a slower decay due to phonon relaxation. Superimposed on the slow decay are oscillations attributed to coherent vibrations of the AuNS with a period dependent on probe wavelength, due to size variation of the AuNS. In addition, persistent spectral hole-burning studies indicate depletion of AuNS at the excitation wavelength and formation of redder-absorbing AuNS aggregates. In conjunction with experiments, theoretical calculations were carried out to gain insight into the coherent vibrational oscillations. © 2012 Elsevier B.V. All rights reserved.

Publication Date

8-10-2012

Publication Title

Chemical Physics Letters

Volume

543

Number of Pages

127-132

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.cplett.2012.06.058

Socpus ID

84864458620 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84864458620

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