Photophoretic forces: A new enabler for robust single fiber-based optical traps in air

Souvik Sil; Ayan Banerjee

doi:10.1117/12.2529859

9 September 2019 Photophoretic forces: A new enabler for robust single fiber-based optical traps in air

Souvik Sil, Ayan Banerjee

Proceedings Volume 11083, Optical Trapping and Optical Micromanipulation XVI; 110833A (2019) https://doi.org/10.1117/12.2529859
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

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.

Citation Download Citation

Souvik Sil and Ayan Banerjee "Photophoretic forces: A new enabler for robust single fiber-based optical traps in air", Proc. SPIE 11083, Optical Trapping and Optical Micromanipulation XVI, 110833A (9 September 2019); https://doi.org/10.1117/12.2529859

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