"Intracavity optical trapping with Ytterbium doped fiber ring laser"

Intracavity optical trapping with Ytterbium doped fiber ring laser

Rania Sayed (a), Fatemeh Kalantarifard (b), Parviz Elahi (b), F. Omer Ilday (b),
Giovanni Volpe (b), Onofrio M. Maragò (a)


(a) Istituto per i Processi Chimico-Fisici (Italy)
(b) Bilkent University (Turkey)


The first optical tweezers (OT) was realized using a laser beam strongly focused by a high
numerical aperture objective lens. Since then, OT have been used to manipulate, rotate and
assemble a variety of nanostructures. Here we demonstrate a novel approach to optical
trapping based on optical feedback-locking that can be applied with low numerical aperture
lenses (NA= 0.35, 0.45). We can achieve stable optical trapping at very low power (0.3 mW)
with injected current close to the threshold current of the diode laser. This technique
is very useful for dealing with biological samples which need very low power to prevent
photodamage.

Place: Conference 8810, Optical Trapping and Optical Micromanipulation X
25 - 29 August 2013
San Diego, CA, USA