Silicon-coated gold nanoparticles nanoscopy

Yossef Danan; Tali Ilovitsh; Yehonatan Ramon; Dror Malka; Danping Liu; Zeev Zalevsky

doi:10.1117/1.JNP.10.036015

8 September 2016 Silicon-coated gold nanoparticles nanoscopy

Yossef Danan, Tali Ilovitsh, Yehonatan Ramon, Dror Malka, Danping Liu, Zeev Zalevsky

Author Affiliations +

Journal of Nanophotonics, Vol. 10, Issue 3, 036015 (September 2016). https://doi.org/10.1117/1.JNP.10.036015

Abstract

This paper presents a method for modifying the point spread function (PSF) into a doughnut-like shape, through the utilization of the plasma dispersion effect (PDE) of silicon-coated gold nanoparticles. This modified PSF has spatial components smaller than the diffraction limit, and by scanning the sample with it, super-resolution can be achieved. The sample is illuminated using two laser beams. The first is the pump, with a wavelength in the visible region that creates a change in the refractive index of the silicon coating due to the PDE. This creates a change in the localized surface plasmon resonance wavelength. Since the pump beam has a Gaussian profile, the high intensity areas of the beam experience the highest refractive index change. When the second beam (i.e., the probe) illuminates the sample with a near-infrared wavelength, this change in the refractive index is transformed into a change in the PSF profile. The ordinary Gaussian shape is transformed into a doughnut shape, with higher spatial frequencies, which enables one to achieve super-resolution by scanning the specimen using this PSF. This is a step toward the creation of a nonfluorescent nanoscope.

Citation Download Citation

Yossef Danan, Tali Ilovitsh, Yehonatan Ramon, Dror Malka, Danping Liu, and Zeev Zalevsky "Silicon-coated gold nanoparticles nanoscopy," Journal of Nanophotonics 10(3), 036015 (8 September 2016). https://doi.org/10.1117/1.JNP.10.036015

Published: 8 September 2016

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