Instantaneous luminescence of NV− center in diamond pumped by a femtosecond laser pulseстатья
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Дата последнего поиска статьи во внешних источниках: 1 октября 2025 г.
Аннотация:The process of luminescence excitation of negatively charged NV centers in diamond is investigated by the up-conversion method with a femtosecond resolution. Our experimental technique allowed us to register that NV− center luminescence starts in the whole 600–800 nm spectral range in a time not exceeding 30 fs after excitation by the second harmonic of the femtosecond ytterbium laser. We have established that there is no time-dependent Stokes shift in the luminescence spectrum of the NV− center, which could be caused by relaxation of coherent phonon excitation. A theoretical model of NV− center describes the dynamics of the luminescence spectrum due to non-resonant Rabi oscillations of color center polarization and provides a quantitative agreement with experimental data. Thus, NV− center is a promising source of quantum light with ultrafast formation of luminescence.