Vortical laser tweezers with predetermined intensity structure

Kirill N. Afanasiev; Eugeny G. Abramochkin; Alexander V. Korobtsov; Svetlana P. Kotova; Nikolay N. Losevsky; Eugenia V. Razueva; Vladimir G. Volostnikov

doi:10.1117/12.733864

5 September 2007 Vortical laser tweezers with predetermined intensity structure

Kirill N. Afanasiev, Eugeny G. Abramochkin, Alexander V. Korobtsov, Svetlana P. Kotova, Nikolay N. Losevsky, Eugenia V. Razueva, Vladimir G. Volostnikov

Author Affiliations +

Proceedings Volume 6644, Optical Trapping and Optical Micromanipulation IV; 664410 (2007) https://doi.org/10.1117/12.733864
Event: NanoScience + Engineering, 2007, San Diego, California, United States

Abstract

The intensity of spiral beams remains unchanged under propagation and focusing neglecting scaling and rotation. The spiral beam with predetermined intensity in the shape of any planar curve can be generated by use of amplitude and phase elements concurrently. We introduce the new method of singular laser fields formation, close to spiral type, by means of pure phase modulation. Our algorithm is based on the well-known Gerchberg-Saxton phase retrieval algorithm and spiral beams optics. It demonstrates fast convergence and some other advantages: phase distributions obtained are stable to spatial resolution changing (it is enough 128 x 128 pixels for some patterns), theoretical energy efficiency is about 85 % with acceptable intensity homogeneity. We demonstrate theoretical results on fields formation in the shape of closed-curves (triangular, square, "snowflake") and open-ended curve (Archimedes spiral) by means of elements on dichromate gelatin. Besides, the example of experiment on micromanipulation with the use of the square-shaped field is presented.

Citation Download Citation

Kirill N. Afanasiev, Eugeny G. Abramochkin, Alexander V. Korobtsov, Svetlana P. Kotova, Nikolay N. Losevsky, Eugenia V. Razueva, and Vladimir G. Volostnikov "Vortical laser tweezers with predetermined intensity structure", Proc. SPIE 6644, Optical Trapping and Optical Micromanipulation IV, 664410 (5 September 2007); https://doi.org/10.1117/12.733864

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