Field distribution of optical fiber probe for trapping particle

Zhaohui Hu; Jia Wang; Jinwen Liang

doi:10.1117/12.481721

5 September 2002 Field distribution of optical fiber probe for trapping particle

Zhaohui Hu, Jia Wang, Jinwen Liang

Proceedings Volume 4923, Nano-Optics and Nano-Structures; (2002) https://doi.org/10.1117/12.481721
Event: Photonics Asia, 2002, Shanghai, China

Abstract

The technique ofoptical fiber trapping has been successfully used to manipulate small particles, while near field optical tweezers based on the sub-wavelength size fiber tip has been proposed to trap nanometric particles. With some similar physical mechanism and properties they are investigated and analyzed respectively in this paper. Firstly the optical field distributions of uncoated fiber probe with different radii of tip, from several microns down to zero, are calculated and analyzed by 3D finite-difference time-domain (FDTD) method. Then the metal-coated fiber probe is also discussed in the same way. In conclusion, the light from the fiber probe with the radius larger than wavelength is converged at a cometic spot, whatever with or without metal coating. When the radius of metal-coated tip is smaller than halfofwavelength, the evanescent field occurs and decays rapidly. The local field enhancement dominates in the metal-coated probe ifthe radius is smaller.

Citation Download Citation

Zhaohui Hu, Jia Wang, and Jinwen Liang "Field distribution of optical fiber probe for trapping particle", Proc. SPIE 4923, Nano-Optics and Nano-Structures, (5 September 2002); https://doi.org/10.1117/12.481721

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