Study of local photomodification of nanomaterials using near-field optics

W. D. Bragg; Katyayani Seal; Viktor A. Podolskiy; Vladimir P. Safonov; Jane G. Zhu; Vladimir M. Shalaev; Z. Charles Ying

doi:10.1117/12.363845

22 September 1999 Study of local photomodification of nanomaterials using near-field optics

W. D. Bragg, Katyayani Seal, Viktor A. Podolskiy, Vladimir P. Safonov, Jane G. Zhu, Vladimir M. Shalaev, Z. Charles Ying

Author Affiliations +

Proceedings Volume 3791, Near-Field Optics: Physics, Devices, and Information Processing; (1999) https://doi.org/10.1117/12.363845
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Thin films of randomly distributed silver nanoparticles are studied experimentally using photon scanning tunneling microscopy and theoretically using real-space renormalization group method. The studies reveal large variations of local optical intensity at sub-wavelength scales. In addition, irradiation of the film by nanosecond laser pulses is observed to yield substantial changes in the local optical response. The threshold for the photomodification is less than 10 mJ/cm². It is believed that particles within some areas of nanometer scales are restructured during nanosecond laser irradiation. The geometric changes in turn result in modification of the local optical intensity.

Citation Download Citation

W. D. Bragg, Katyayani Seal, Viktor A. Podolskiy, Vladimir P. Safonov, Jane G. Zhu, Vladimir M. Shalaev, and Z. Charles Ying "Study of local photomodification of nanomaterials using near-field optics", Proc. SPIE 3791, Near-Field Optics: Physics, Devices, and Information Processing, (22 September 1999); https://doi.org/10.1117/12.363845

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