Spatiotemporal-photothermal and photoacoustic conversions with local plasmon resonators

Kyoko Namura; Motofumi Suzuki; Kaoru Nakajima; Kenji Kimura

doi:10.1117/12.892657

26 September 2011 Spatiotemporal-photothermal and photoacoustic conversions with local plasmon resonators

Kyoko Namura, Motofumi Suzuki, Kaoru Nakajima, Kenji Kimura

Proceedings Volume 8104, Nanostructured Thin Films IV; 810406 (2011) https://doi.org/10.1117/12.892657
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

We have investigated the heat generation from gold nanoparticles resulting from their local plasma resonance. The selfassembly of Au nanoparticle arrays/dielectric layer/Ag mirror sandwiches, namely, local plasmon resonators, have been demonstrated by using a dynamic oblique deposition technique. Due to strong interference, the optical absorption of the local plasmon resonator chips we prepared is successfully controlled between 0.0% and 97% in the near-infrared region, by changing the thickness of the dielectric layer. We evaluated the heat generation from Au nanoparticles by measuring the temperature of water with which a cell prepared on a chip was filled under laser illumination. The temperature increase of the water is proportional to the optical absorption of the local plasmon resonator chips. This suggests that the photothermal conversion efficiency can be controlled by interference. In order to show the temporal controllability of heat generation, we also demonstrated photoacoustic measurements. The acoustic signal from the local plasmon resonator chips was much larger than the signal not only form high reflective Ag thin film but also from the graphite. These features indicate that the local plasmon resonators are suitable for nanoheaters which are capable of spatio-temporal control.

Citation Download Citation

Kyoko Namura, Motofumi Suzuki, Kaoru Nakajima, and Kenji Kimura "Spatiotemporal-photothermal and photoacoustic conversions with local plasmon resonators", Proc. SPIE 8104, Nanostructured Thin Films IV, 810406 (26 September 2011); https://doi.org/10.1117/12.892657

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available