Towards spatio-temporal control in optical trapping

Debjit Roy; Arijit Kumar De; Debabrata Goswami

doi:10.1117/12.824372

20 August 2009 Towards spatio-temporal control in optical trapping

Debjit Roy, Arijit Kumar De, Debabrata Goswami

Proceedings Volume 7400, Optical Trapping and Optical Micromanipulation VI; 74000G (2009) https://doi.org/10.1117/12.824372
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

Using both continuous-wave (CW) and high repetition rate femtosecond lasers, we present stable 3-dimensional trapping of 1μm polystyrene microspheres. We also stably trapped 100nm latex nanoparticles using the femtosecond mode-locked laser at a very low average power where the CW lasers cannot trap, demonstrating the significance of the fleeting temporal existence of the femtosecond pulses. Trapping was visualized through dark-field microscopy as well as through a noise free detection using two-photon fluorescence as a diagnostics tool owing to its intrinsic 3- dimensional resolution. Comparison between a Gaussian versus a flat-top Gaussian beam profile demonstrates the importance of laser spatial mode in optical trapping.

Citation Download Citation

Debjit Roy, Arijit Kumar De, and Debabrata Goswami "Towards spatio-temporal control in optical trapping", Proc. SPIE 7400, Optical Trapping and Optical Micromanipulation VI, 74000G (20 August 2009); https://doi.org/10.1117/12.824372

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