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Journal of Luminescence

Microwave-induced line-narrowing of the N-V defect absorption in diamond

Eric van Oort, B. van der Kamp, R. Sitter, Max Glasbeek

Published Jan 1, 1991• 23 citations
Publisher
DOI
10.1016/0022-2313(91)90245-q

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Origin of persistent hole burning of N–V centers in diamond

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New satellite features and antiholes in the persistent hole-burning spectrum of N–V centers in diamond, as well as their dependences on applied electric fields and frequency within the inhomogeneous absorption line, are reported. These results, together with reassignments of spin states of this center, permit an understanding of the origin of the satellite holes as well as of possible mechanisms for the persistent hole-burning phenomenon itself. In addition we report narrow optical interference fringes in heterodyne-detected spectra of persistent spectral holes in the N–V defect center in diamond and discuss a recent suggestion for high-resolution Ramsey-fringe hole-burning spectroscopy of solids based on phase-separated fields.

Journal of the Optical Society of America B•May 1, 1992•58 citations
Magnetometry with nitrogen-vacancy (NV) centers in diamond has shown great promise in recent years. In particular, absorption-based magnetometry techniques, employing a cavity to enhance the absorption length, can improve the contrast and sensitivity compared to conventional techniques based on reading out the NV−^-− triplet fluorescence. The absorption techniques rely on magnetic-field-dependent absorption at the NV−^-− singlet zero phonon line at 1042 \,nm and its phonon sideband. In a cavity-enhanced spectroscopy approach, we study pump-laser- and microwave-induced cavity signal changes at room temperature over a spectral range of 680-1050 \,nm. Through normalization, we eliminate the cavity-enhancement effect and provide quasi-single-pass values for the absorption and optically detected magnetic resonance (ODMR) contrast. The highest contrast is found at 1042 \,nm, but multiple points of high contrast are found at the peaks of the phonon sideband. Additionally, cavity-enhanced ODMR contrasts in the range of 50-80 %\,\%% are presented. We further measure the broadband singlet absorption cross section at room temperature with a novel method through microwave-induced signal changes. This method is insensitive to pump-laser-induced signal changes by other defects and quantifies the room-temperature absorption strength of the singlet transition and its entire phonon sideband. We determine the absorption cross section at 1042 \,nm to be σ1042 ★=(0.89±0.14)⋅10−21 m2σ^{\,\bigstar}_{1042}=(0.89\pm0.14)\cdot 10^{-21}\,\text{m}^2σ1042★​=(0.89±0.14)⋅10−21m2 or σ1042 ▲=(2.9±0.5)⋅10−21 m2σ^{\,\blacktriangle}_{1042}=(2.9\pm0.5)\cdot 10^{-21}\,\text{m}^2σ1042▲​=(2.9±0.5)⋅10−21m2. depending on the employed 532 \,nm NV−^-− absorption cross section.
New satellite features and antiholes in the persistent hole-burning spectrum of N–V centers in diamond, as well as their dependences on applied electric fields and frequency within the inhomogeneous absorption line, are reported. These results, together with reassignments of spin states of this center, permit an understanding of the origin of the satellite holes as well as of possible mechanisms for the persistent hole-burning phenomenon itself. In addition we report narrow optical interference fringes in heterodyne-detected spectra of persistent spectral holes in the N–V defect center in diamond and discuss a recent suggestion for high-resolution Ramsey-fringe hole-burning spectroscopy of solids based on phase-separated fields.