Room Temperature Optical Thermometry Based on the Luminescence of the SiV Defects in Diamond

• Published in: Optics and spectroscopy Vol. 126; no. 1; pp. 59 - 61
• Main Authors: Miller, C., Puust, L., Kiisk, V., Ekimov, E., Vlasov, I., Orlovskii, Y., Sildos, I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2019; Springer Nature B.V
• Subjects: Defects; Diamonds; High temperature; Lasers; Microcrystals; Near infrared radiation; Optical Devices; Optical Sensors and Transducers; Optics; Photoluminescence; Photonics; Physics; Physics and Astronomy; Room temperature; Temperature; Temperature dependence; Thermometry
• ISSN: 0030-400X; 1562-6911
• DOI: 10.1134/S0030400X19010119

Diamond microcrystals containing silicon-vacancy (SiV) defects were synthesized by using a high-pressure high-temperature treatment of a mixture of pertinent organic-inorganic precursors. Photoluminescence of the SiV defects and its temperature dependence (80–400 K) was studied. A strong sharp zero-phonon line (ZPL) at 738 nm was recorded at all temperatures under 488 nm laser excitation. In particular the thermally induced shift of the ZPL was found promising for optical temperature sensing in the near infrared spectral range at biomedically relevant temperatures.