Coherent Control of Ultra-High Frequency Acoustic Resonances in Photonic Crystal Fibers

Details Coherent Control of Ultra-High Frequency Acoustic Resonances in Photonic Crystal Fibers Coherent Control of Ultra-High Frequency Acoustic Resonances in Photonic Crystal Fibers

2007-11-28

arxiv.org/abs/0711.4365v2

Phys. Rev. Lett. 100, 203903 (2008)

Physics

Optics

4 pages, 3 figures, 3 avi movies (external link) - accepted in PRL

Scientific paper

10.1103/PhysRevLett.100.203903

Ultra-high frequency acoustic resonances ($\backsim$2 GHz) trapped within the glass core ($\backsim$1 $\mu$m diameter) of a photonic crystal fiber are selectively excited through electrostriction using laser pulses of duration 100 ps and energy 500 pJ. Using precisely timed sequences of such driving pulses, we achieve coherent control of the acoustic resonances by constructive or destructive interference, demonstrating both enhancement and suppression of the vibrations. A sequence of 27 resonantly-timed pulses provides a 100-fold increase in the amplitude of the vibrational mode. The results are explained and interpreted using a semi-analytical theory, and supported by precise numerical simulations of the complex light-matter interaction.

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