Temperature-dependent second-harmonic generation from color centers in diamond

Abstract

Under infrared ultrashort pulse laser stimulation, we investigated temperature-dependent second-harmonic generation (SHG) from nitrogen-vacancy (NV)-introduced bulk diamond. The SHG intensity decreases in the temperature range of 20-300 ${}^{\circ }C$, due to phase mismatching caused by refractive index modification. We discovered that optical phonon scattering outperforms acoustic phonon one in NV diamond by fitting the temperature dependence of SHG intensity using a model based on the bandgap change via the deformation potential interaction. This study presents an efficient and viable way for creating diamond-based nonlinear optical temperature sensing.

arXiv comment4 pages, 3 figures

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• Plasmon-enhanced ultrafast time-resolved spectroscopy of NV-containing diamond
• Nonlinear optical response and spontaneous polarization in layer-stacked gallenene using second harmonic generation