Plasmonic annular aperture arrays for nanoparticle manipulation

Domna G. Kotsifaki; Xue Han; Viet Giang Truong; Síle Nic Chormaic

doi:10.1117/12.2507169

1 March 2019 Plasmonic annular aperture arrays for nanoparticle manipulation

Domna G. Kotsifaki, Xue Han, Viet Giang Truong, Síle Nic Chormaic

Proceedings Volume 10935, Complex Light and Optical Forces XIII; 109351H (2019) https://doi.org/10.1117/12.2507169
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

In this work, we present experimental results on the optical trapping and manipulation of micro- and nanoparticles using plasmonic tweezers based on arrays of annular nanoapertures. By increasing the inner disk size of the nanoaperture, a redshift of the resonant wavelength is observed. We demonstrate both trapping and transportation of particles across the plasmonic device using a drag force method with incident laser intensities less than 1.5 mWμm⁻². We calculate trap stiffnesses equal to 0.25 pN/μm·mW and 1.07 pN μm⁻¹mW⁻¹ for 0.5 μm and 1 μm diameter particles, respectively. A high trap stiffness of 0.85 fN/nm· mW at a low incident laser intensity of ~0.51 mW/μm² at 980 nm was obtained for 30 nm diameter polystyrene particles. We perform sequential single-nanoparticle trapping within specific trapping sites. The demonstrated plasmonic nanotweezers could be used for lab-on-a-chip devices where efficient particle trapping with high tunability of the applied laser wavelength is required.

Conference Presentation

Citation Download Citation

Domna G. Kotsifaki, Xue Han, Viet Giang Truong, and Síle Nic Chormaic "Plasmonic annular aperture arrays for nanoparticle manipulation ", Proc. SPIE 10935, Complex Light and Optical Forces XIII, 109351H (1 March 2019); https://doi.org/10.1117/12.2507169

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