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Proceedings Paper

Optically driven self-oscillations of a silica nanospike at low gas pressures
Author(s): Shangran Xie; Riccardo Pennetta; Roman E. Noskov; Philip St. J. Russell
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Paper Abstract

We report light-driven instability and optomechanical self-oscillation of a fused silica “nanospike” at low gas pressures. The nanospike (tip diameter 400 nm), fabricated by thermally tapering and HF-etching a single mode fiber (SMF), was set pointing at the endface of a hollow-core photonic crystal fiber (HC-PCF) into the field created by the fundamental optical mode emerging from the HC-PCF. At low pressures, the nanospike became unstable and began to self-oscillate for optical powers above a certain threshold, acting like a phonon laser or "phaser". Because the nanospike is robustly connected to the base, direct measurement of the temporal dynamics of the instability is possible. The experiment sheds light on why particles escape from optical traps at low pressures.

Paper Details

Date Published: 16 September 2016
PDF: 3 pages
Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99220A (16 September 2016); doi: 10.1117/12.2236656
Show Author Affiliations
Shangran Xie, Max Planck Institute for the Science of Light (Germany)
Riccardo Pennetta, Max Planck Institute for the Science of Light (Germany)
Roman E. Noskov, Max-Planck-Institut für die Physik des Lichts (Germany)
Philip St. J. Russell, Max Planck Institute for the Science of Light (Germany)

Published in SPIE Proceedings Vol. 9922:
Optical Trapping and Optical Micromanipulation XIII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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