Transverse optical vortices generated by multiwave interference for nanoparticle scattering detection

Wenshuan Lu; Jiakang Zhou; Yuquan Zhang; Xiaocong Yuan; Changjun Min

doi:10.1117/12.3036249

20 November 2024 Transverse optical vortices generated by multiwave interference for nanoparticle scattering detection

Wenshuan Lu, Jiakang Zhou, Yuquan Zhang, Xiaocong Yuan, Changjun Min

Author Affiliations +

Proceedings Volume 13244, Nano-optoelectronics and Micro/Nano-photonics X; 132440V (2024) https://doi.org/10.1117/12.3036249
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

In this work, transverse optical vortices with phase singularities and orbital angular momentum are generated by the interference of three linearly polarized lights. The positions of the transverse optical vortices can be regulated by the relative amplitude and initial phase of the three incident lights. An analytical model is built for control the positions of the generated vortices and its correctness is proved by FDTD simulation, and a method for judging the positive or negative topological charge of the transverse vortices is derived. Based on the Poynting vector distribution of the transverse vortex field, it is found that there is an inverse energy flow near the phase singularity, that is, Poynting vector points to the light source rather than the propagation direction. It is further found that the controllable singularities and the backward energy flow region of the vortex field are very sensitive to the scattering of nanoparticles. When a single metal nanoparticle is placed in the region, several singularity lines with specific directions can be found in the scattering field. By changing the relative position of the single metal nanoparticle to the singularity in nanoscale, the directions of the singularity lines can be modulated. This work realizes the generation and manipulation of transverse optical vortices, and reveals the interaction between the transverse phase singularity and the scattering of metal nanoparticles, which is expected to be applied to nanoscale displacement sensing for nanoparticles.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wenshuan Lu, Jiakang Zhou, Yuquan Zhang, Xiaocong Yuan, and Changjun Min "Transverse optical vortices generated by multiwave interference for nanoparticle scattering detection", Proc. SPIE 13244, Nano-optoelectronics and Micro/Nano-photonics X, 132440V (20 November 2024); https://doi.org/10.1117/12.3036249

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