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Giant breathing mode in the Buckminster fullerene C60
As the fingerprint of the response (relaxation) of C60, electronically excited
in an intense laser field, the breathing mode with very large amplitude is excited
due to electron-vibration coupling [1].
Excitation of giant breathing mode
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Dynamics of C60 excited by a 30 fs laser with ω = 3 eV and an intensity of 3.3e13 W/cm2.
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In a pump-probe experiment, this effect can be observed [1], because the energy absorbed from the probe
pulse and, thus, the multiplicity of the measured fragments depend strongly on the actual cage radius
R(t) and thus on the delay time.
Typical pump-probe scenario
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The pump pulse induces breathing, the probe pulse leads to multifragmentation.
The number of fragments oscillates as a function of the delay time as the radius
oscillates.
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T. Laarmann, I. Shchatsinin, A. Stalmashonak, M. Boyle, N. Zhavoronkov, J. Handt, R. Schmidt, C.P. Schulz, and I.V. Hertel,
Control of Giant Breathing Motion in C60 with Temporally Shaped Laser Pulses,
Phys. Rev. Lett. 98, 058302 (2007).
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