Ultralong coherence times in the purely electronic zero-phonon line emission of single molecules

Kiraz, Alper; Ehrl, Moritz; Bräuchle, Christoph; Zumbusch, Andreas
August 2004
Applied Physics Letters;8/9/2004, Vol. 85 Issue 6, p920
Academic Journal
We report the observation of ultralong coherence times in the purely electronic zero-phonon line emission of single terrylenediimide molecules at 1.4 K. Vibronic excitation and spectrally resolved detection with a scanning Fabry–Perot spectrum analyzer were used to measure a linewidth of 65 MHz. This is within a factor of 1.6 of the transform limit. It therefore indicates that single molecule emission may be suited for applications in linear optics quantum computation. Additionally, it is shown that high-resolution spectra taken with the spectrum analyzer allow for the investigation of fast spectral dynamics in the emission of a single molecule.


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