Optically detected coherent picosecond lattice oscillations in two dimensional arrays of gold nanocrystals of different sizes and shapes induced by femtosecond laser pulses

Wenyu Huang; Wei Qian; Mostafa A. El-Sayed

doi:10.1117/12.620501

26 August 2005 Optically detected coherent picosecond lattice oscillations in two dimensional arrays of gold nanocrystals of different sizes and shapes induced by femtosecond laser pulses

Wenyu Huang, Wei Qian, Mostafa A. El-Sayed

Author Affiliations +

Proceedings Volume 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III; 592701 (2005) https://doi.org/10.1117/12.620501
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The nanosphere lithography (NSL) technique is used to make periodic gold array of prismatic nanoparticles. We use the femtosecond time resolved double beam transient optical detection to determine the coherent lattice oscillation in gold nanoparticles. Coherent lattice oscillation is compared on gold nanoparticles of different sizes and shapes. The effect of changing shape on the oscillation period was studied. Different environmental effects on the coherent lattice oscillation are eliminated by measuring the oscillation of the prismatic shape before and after we anneal it to spherical shape of the same number of atoms. A large change in the oscillation period is observed which agrees with the calculated period using different equations for the corresponding shapes.

Citation Download Citation

Wenyu Huang, Wei Qian, and Mostafa A. El-Sayed "Optically detected coherent picosecond lattice oscillations in two dimensional arrays of gold nanocrystals of different sizes and shapes induced by femtosecond laser pulses", Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 592701 (26 August 2005); https://doi.org/10.1117/12.620501

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