Optical Thermometry with Quantum Emitters in Hexagonal Boron Nitride

Chen, Yongliang; Tran, Tony; Duong, Ngoc My Hanh; Li, Chi; Toth, Milos; Bradac, Carlo; Aharonovich, Igor; Solntsev, Alexander S.; Tran, Toan Trong

doi:10.1021/acsami.0c05735

Cited by 34 publications

(34 citation statements)

References 57 publications

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“…Most recently, hexagonal boron nitride (hBN)-a wide-band-gap (∼6 eV) two-dimensional (2D) semiconductor with some excellent properties-has emerged as an alternative pathway for integrated nanophotonics [19]. There has been a lot of studies on single-photon emitters (SPEs) in hBN [20][21][22][23][24][25][26][27][28][29], because of the extreme brightness [25,28], photoluminescence (PL) stability [21,28], and large stark-shift tuning [23,26]. In addition, some defects display spin-optical quantum properties and can be initialized, manipulated and optically read out at room temperature [30][31][32][33], showing the potential of this material system.…”

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confidence: 99%

Temperature-Dependent Energy-Level Shifts of Spin Defects in Hexagonal Boron Nitride

Liu

Yang

et al. 2021

ACS Photonics

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Two-dimensional hexagonal boron nitride (hBN) has attracted large attentions as platforms for realizations for integrated nanophotonics and collective effort has been focused on the spin defect centers. Here, the temperature dependence of the resonance spectrum in the range of 5-600 K is investigated. The zero-field splitting (ZFS) parameter D is found to decrease monotonicly with increasing temperature and can be described by Varshni empirical equation perfectly, while E almost does not change. We systematically study the differences among different hBN nanopowders and provide an evidence of edge effects on ODMR of V − B defects. Considering the proportional relation between D and reciprocal of lattice volume (V −1 ), the thermal expansion might be the dominant reason for energy-level shifts. We also demonstrate that the V − B defects still exist stably at least at 600 K. Moreover, we propose a scheme for detecting laser intensity using the V − B defects in hBN nanopowders, which is based on the obvious dependence of its D value on laser intensity. Our results are helpful to gain insight into the spin properties of V − B and for the realizations of miniaturized, integrated thermal sensor.

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confidence: 99%

Temperature-Dependent Energy-Level Shifts of Spin Defects in Hexagonal Boron Nitride

Liu

Yang

et al. 2021

ACS Photonics

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“…It also allows for the accurate placement of individual nanoprobe with respect to target areas or objects. This was demonstrated in a study that used a fluorescent hBN nanoparticle as an optical nanothermometer-placed deterministically onto a micro-circuit-to measure local temperature and potential hot spots in target areas of the device [175].…”

Section: Beyond Optical Imagingmentioning

confidence: 99%

High-Resolution Optical Imaging and Sensing Using Quantum Emitters in Hexagonal Boron-Nitride

Bradac

2021

Front. Phys.

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Super-resolution microscopy has allowed optical imaging to reach resolutions well beyond the limit imposed by the diffraction of light. The advancement of super-resolution techniques is often an application-driven endeavor. However, progress in material science plays a central role too, as it allows for the synthesis and engineering of nanomaterials with the unique chemical and physical properties required to realize super-resolution imaging strategies. This aspect is the focus of this review. We show that quantum emitters in two-dimensional hexagonal boron nitride are proving to be excellent candidate systems for the realization of advanced high-resolution imaging techniques, and spin-based quantum sensing applications.

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“…The resulting methacrylated PGLyD was then precipitated in isopropanol (purity: 99.9%, Sigma-Aldrich) and dried under reduced pressure at room temperature (25 ºC) overnight. 1 H-NMR spectra (Bruker ARX 300 MHz, DMSO-d 6 ) suggested that only one methacrylic group was incorporated into PGLyD structure.…”

Section: Coho:pglyd Synthesismentioning

confidence: 99%

“…The number of materials for OPT techniques is remarkably large including organic dyes 3 , semiconductors 4 , synthetic diamonds 5 , quantum emitters 6 and lanthanide complexes 7 . However, the major drawbacks that limit applications of these materials in OPT are the need of ultraviolet/visible/ near-infrared excitations, sophisticated spectrophotometry instrumentation, toxicity and a potentially unstable balance of demand and supply of raw material for the manufacture of OPT devices 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Intelligent Optical Temperature Sensor based on Polyglycerol Dendrimer Microspheres Encapsulating Hopeites

et al. 2021

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Optical thermometry is a growing technological field which exploits the ability of certain materials to change their optical properties with temperature. In this work, poly(glycerol dendrimer) microspheres (PGLyD) encapsulating cobalt-doped hopeite (CoHo) was synthesized for its potential use as optical thermometer. The structure of the CoHo:PGLyD was studied using scanning electron microscopy (SEM), infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). On the basis of SEM images, the CoHo:PGLyD exhibited a spherical shape in which around 80% of the microspheres were within 0.82 µm. A multilayer feed-forward artificial neural network (MLP-ANN) was used to extract the chromaticity profile dependence of the CoHo:PGLyD with temperature. A color change was observed for the CoHo:PGLyD, going from dark blue (490-550 nm) to pale pink (650 nm) when the temperature changed from 20-200 °C, respectively. These results suggest that CoHo:PGLyD is a promising material for temperature sensing applications.

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Optical Thermometry with Quantum Emitters in Hexagonal Boron Nitride

Cited by 34 publications

References 57 publications

Temperature-Dependent Energy-Level Shifts of Spin Defects in Hexagonal Boron Nitride

Temperature-Dependent Energy-Level Shifts of Spin Defects in Hexagonal Boron Nitride

High-Resolution Optical Imaging and Sensing Using Quantum Emitters in Hexagonal Boron-Nitride

Intelligent Optical Temperature Sensor based on Polyglycerol Dendrimer Microspheres Encapsulating Hopeites

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