Background-free two-photon fluorescence readout via a three-photon charge-state modulation of nitrogen-vacancy centers in diamond
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-07-22 |
| Journal | Optics Letters |
| Authors | И. В. Федотов, А. М. Желтиков |
| Institutions | Lomonosov Moscow State University, Texas A&M University |
| Citations | 13 |
Abstract
Section titled “Abstract”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<sup>-</sup> and NV<sup>0</sup> charge states, but keeping the nonlinearity of n-photon ionization needed for NV<sup>-</sup>/NV<sup>0</sup> charge-state modulation to a minimum, n=3.