Diamond contact-less micrometric temperature sensors

摘要

An alternative approach for high-speed temperature measurement with micrometer-scale spatial resolution based on the luminescence of Ni-doped diamond micro-particles is described. Under picosecond pulsed laser excitation, these particles exhibit intense green luminescence; the lifetime of this luminescence decreases by several orders of magnitude upon heating from 120K up to 900 K. The intensity of the luminescence remains constant over this temperature range. Real-time measurements were performed with repetition rates of up to 100 Hz with a temperature resolution of better than 1 ℃.