We present a room temperature nonlinear mass sensing based on a hybrid spin-nanoresonator system with the microwave pump–probe technique and the spin readout technique, which includes a single spin of nitrogen–vacancy (NV) center in diamond and a nanomechanical cantilever. The resonance frequency of the nanoresonator can be measured with the nolinear Kerr spectrum, and the parameters that influence the nolinear Kerr spectrum are also investigated. Further, according to the relationship between frequency shifts and variable mass attached on the nanoresonator, this system can also be used to detect the mass of DNA molecules with the nolinear Kerr spectrum. Benefiting from the single spin of the NV center in diamond has a long coherence time at 300 K, the hybrid system can realize room temperature mass sensor, and the mass response rate can reach 2600 zg/Hz.
* Project supported by the National Natural Science Foundation of China (Grant Nos. 11647001 and 11804004) and Anhui Provincial Natural Science Foundation (Grant No. 1708085QA11).
Cite this article:
Jian-Yong Yang(杨建勇) and Hua-Jun Chen(陈华俊)† Room temperature nonlinear mass sensing based on a hybrid spin-nanoresonator system 2020 Chin. Phys. B 29 107801
Fig. 1.
Schematic diagram of a spin–oscillator system of a magnetized clamped-free NR coupled to the electronic spin associated with an NV center in diamond in the presence of a strong pump laser and a weak probe laser.
Fig. 2.
The optical Kerr coefficient as a function of the detuning of the probe field from the exciton resonance with three vibrational frequencies of NR ωn = 0.8 MHz, ωn = 1.0 MHz, and ωn = 1.2 MHz for Ω2 = 81(kHz)2, Δc = 0, γn = 10−3 kHz, and g0 = 40 kHz.
Fig. 3.
(a) The optical Kerr coefficient as functions of the probe field from the exciton for different coupling strengths. (b) The detailed parts of the left peaks in panel (a). (c) The optical Kerr coefficient as functions of the probe field from the exciton with several different decay rates. (d) The detailed parts of the left peaks in panel (c).
Fig. 4.
The optical Kerr coefficient without anything else and with 10 or 30 DNA molecules on the surface of NR. The inset shows the relationship between the frequency shift of NR and the number of added DNA molecules.
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