[10a-N205-1~9] CS.8 Code-sharing session of 6.2&KS1

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10a-N205-8] High-speed, high-precision temperature measurement
with nitrogen-vacancy centers using maximum likelihood estimation

〇(DC)Shuntaro Usui¹, Akirabha Chanuntranont¹, Ota Tomoki¹, Nomura Ryouta¹, Kobayashi Yuka¹, Tanii Takashi¹ (1.Waseda Univ.)

Keywords:

NV center,Temperature measurement,Maximum likelihood estimation

Although Ramsey-type pulsed ODMR offers outstanding temperature sensitivity at single nitrogen-vacancy (NV) centers in nanodiamonds, its reliance on many repetitions leads to long acquisition times. Here, we simulated photon-counting traces by adding Poisson noise to ideal Ramsey oscillations with a prescribed resonance frequency and coherence time T2*. The resonance shift was extracted from the synthetic data using both nonlinear least-squares fitting and maximum-likelihood estimation (MLE). Accuracy benchmarks versus total measurement time show that MLE attains the same precision with far fewer shots, underscoring its promise for fast, high-sensitivity nanoscale thermometry.