Plasmonic control of analyte motion

Marciano A. Palma do Carmo; David Mack; Diane J. Roth; Steve Po; Miao Zhao; Stefan A. Maier; Paloma A. Huidobro; Aliaksandra Rakovich

doi:10.1117/12.2620980

24 May 2022 Plasmonic control of analyte motion

Marciano A. Palma do Carmo, David Mack, Diane J. Roth, Steve Po, Miao Zhao, Stefan A. Maier, Paloma A. Huidobro, Aliaksandra Rakovich

Author Affiliations +

Proceedings Volume PC12131, Nanophotonics IX; PC121310X (2022) https://doi.org/10.1117/12.2620980
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Controlled manipulation and trapping of submicron-size particles has many applications in different research fields, including those in the general areas of biology and soft-condensed matter physics. Optical tweezers that make use of strongly focused laser beams are widely used for this purpose. However, their trapping abilities are substantially limited by diffraction and a lack of scalability. To overcome this, nanostructures made of plasmonic materials have attracted significant attention, as their ability to concentrate energy to very small dimensions can be exploited to generate optical traps capable of acting on nanometer-size objects. Furthermore, and when compared to conventional systems, these plasmonic traps also provide large field enhancements that allow for lower input powers. Despite such advantages, these techniques still lack the ability to provide the controlled manipulation of the trapped objects over long distances. In this work we present a Brownian ratchet, based on plasmonic interactions, which can optically trap and manipulate dielectric nanometer-sized beads over long distances. For this purpose, the geometries of the plasmonic ratchets and the respective electric fields were modelled with COMSOL Multiphysics, and the optical forces experienced by the beads were calculated with COMSOL Multiphysics and processed with MATLAB®. Additionally, we experimentally demonstrate the rectification of the random thermal motion of subwavelength dielectric beads into one specific direction by periodically turning on and off a laser beam that illuminates the plasmonic nanostructure array and exploiting the asymmetries in the system.

Conference Presentation

Citation Download Citation

Marciano A. Palma do Carmo, David Mack, Diane J. Roth, Steve Po, Miao Zhao, Stefan A. Maier, Paloma A. Huidobro, and Aliaksandra Rakovich "Plasmonic control of analyte motion", Proc. SPIE PC12131, Nanophotonics IX, PC121310X (24 May 2022); https://doi.org/10.1117/12.2620980

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Plasmonics

Analytical research

Motion analysis

Motion controllers

Dielectrics

Nanostructures

Optical tweezers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years