Background-free two-photon fluorescence readout via a three-photon charge-state modulation of nitrogen-vacancy centers in diamondстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:We demonstrate that a background-free readout of two-photon fluorescence from nitrogen-vacancy (NV) centers in a strongly fluorescing environment can be accomplished by all-optical means via a multiphoton charge-state modulation of NV centers in a mixture of negatively charged and neutral NV centers. A 100 fs, 1060 nm output of an ytterbium fiber laser is ideally suited for this modality of multiphoton microscopy, providing, as our experiments show, an efficient two-photon excitation of both NV− and NV0 charge states, but keeping the nonlinearity of 𝑛-photon ionization needed for NV−/NV0 charge-state modulation to a minimum, 𝑛=3.