Diamond nitrogen-vacancy center charge state ratio determination at a given sample point

Nickel‐Related Centers in HPHT Microdiamonds for Near‐Infrared Luminescent Thermometry

“…We believe that isoemission point presence indicates the excitation transfer between different energy states of the emitter. Such point has been observed in NV and SiV centers in diamond, [ 13,26 ] quantum dots, [ 27 ] as well as luminescent materials doped with rare‐earth ions. [ 28 ] Isoemission point can be used as a reference to compensate for fluctuations in intensity during measurements, thereby improving the temperature determination (TD) accuracy.…”

The concentration estimation for ensemble of NV– color centers with spin coherent manipulation

“…Figure 3(c) shows the fluorescence spectrum of the NV − excited by a 532 nm laser, from which it can clearly be seen that there is a prominent peak near the wavelength of 637 nm, which is caused by the absorption of the 532 nm laser energy jump by the two ground-state energy levels in the NV − with spin m s = 0 and spin m s = ±1, and it is the ZPL of the NV − . 26) In the actual measurement process, due to the influence of the lattice stress caused by the NV − color center environment, other defects around, and the ambient temperature, and optical environment due to the surrounding medium, the ZPL will be offset to the vicinity of 638-639 nm. There is also a phonon sideband with a width of 032002-3 © 2024 The Japan Society of Applied Physics about 200 nm beside the ZPL, 27) which is generated by the interaction between the NV − and the lattice vibration, and the existence of the phonon sideband provides information about the interaction between the NV − and its surrounding environment.…”