Extended optical binding with single and two focal laser beams

Tomohiro Yokoyama; Yukihiro Tao; Hajime Ishihara

doi:10.1117/12.3008342

20 September 2023 Extended optical binding with single and two focal laser beams

Tomohiro Yokoyama, Yukihiro Tao, Hajime Ishihara

Proceedings Volume 12606, Optical Manipulation and Structured Materials Conference; 126060O (2023) https://doi.org/10.1117/12.3008342
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

A non-contacting method to manipulate and array many nanoparticles is an important subject for physics, chemistry, and biology. The optical manipulation and binding provide rich functionalities and degrees of freedom to form a ordered assembly of particles by combining with heat generation, hydrodynamic effect, chemical reaction, etc. In this study, we extend a concept of the optical binding to achieve a wide-area particle formation by an optical method. In contrast to a conventional optical binding with a wide-area laser irradiation, we consider a tightly focal laser irradiation, where one or a few gold particles are directly trapped at the focal center and the others are bound indirectly at the out of irradiation area. For the indirect binding, the interference in multiple scattering is significant. The bound particles revolve by the spin angular momentum of laser. The revolution is stable dynamics since the revolution axis is well defined. For the focal laser, we have several control parameters, e.g., NA, focal depth, and number of beams. Then, we consider the optical binding by two focal laser beams. This extension brings an increase of control parameters. We focus on the circular polarized two lasers with seven particles binding in the respective irradiation area. The scattered light from one laser spot disturbs the dynamics of particles at other laser spot and revolution is frozen in each other. It suggests a nonlocal optical manipulation. When the lasers become close, 14 particles form a single stable array. It enables an on-demand formation of particle array.

Citation Download Citation

Tomohiro Yokoyama, Yukihiro Tao, and Hajime Ishihara "Extended optical binding with single and two focal laser beams", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 126060O (20 September 2023); https://doi.org/10.1117/12.3008342

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
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Particles

Optical binding

Laser irradiation

Simulations

Laser scattering

Gold nanoparticles

Optical manipulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years