We develop single fiber based optical tweezers employing photophoretic forces to trap absorbing particles exploiting the rotational motion displayed by the particles to be stably trapped radially. This implies that optical beams with a large off-axis intensity would prove to be more efficacious in trapping. Thus, we generate a pure Gaussian as well as a superposition of Gaussian and Hermite-Gaussian beam modes from a single optical fiber which is dual mode at our operating wavelength, and show that the latter is more efficacious in trapping by about 1.8 times than the former. Finally, we show that multimode fiber traps - which have even larger off-axis intensity distribution - are the most effective in trapping and manipulating absorbing particles.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print format on
SPIE.org.