Photon echo on the homogeneously broadened spectral line

Masaki Aihara

It is predicted that a new type of photon echo appears in a strongly coupled localized-electron-phonon system with a broad homogeneous spectral width. These echoes arise because of the reversibility of the decay of the phonon wave packet, and their formation is independent of the inhomogeneous broadening of spectral line due to the spatial crystalline field inhomogeneity.

Aleksey I. Alekseev, I. V. Evseev

Vitali V. Samartsev

Игорь Сергеевич Осадько, M. V. Stashek

Fluorescence—line—narrowing, spectral hole—burning and single molecule spectroscopy are methods of selective spectroscopy using zero-phonon lines (ZPL) to make selection in molecular ensemble. However if electron-phonon coupling is strong or sample temperature is near to room temperature, ZPL are absent and the optical band consists of electron-phonon transitions which are called phonon-side-band (PSB). In these cases the above mentioned methods of selective spectroscopy do not work. Can we get an information concerning a homogeneous optical band from inhomogeneously broadened bands in these cases? The answer is yes if we use femtosecond photon echo.

Roger F. Loring, Shaul Mukamel

В. А. Зуйков, А. А. Калачев, В. В. Самарцев +2 more