Over the past few decades, spin detection and manipulation at the atomic scale using scanning tunneling microcopy has matured, which has opened the possibility of realizing spin-based functional devices with single at...Over the past few decades, spin detection and manipulation at the atomic scale using scanning tunneling microcopy has matured, which has opened the possibility of realizing spin-based functional devices with single atoms and molecules.This article reviews the principle of spin polarized scanning tunneling microscopy and inelastic tunneling spectroscopy,which are used to measure the static spin structure and dynamic spin excitation, respectively. Recent progress will be presented, including complex spin structure, magnetization of single atoms and molecules, as well as spin excitation of single atoms, clusters, and molecules. Finally, progress in the use of spin polarized tunneling current to manipulate an atomic magnet is discussed.展开更多
The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement.By applying the phasegradient metasurface(PGM)to atomic magnetometers(AMs),...The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement.By applying the phasegradient metasurface(PGM)to atomic magnetometers(AMs),we have proposed and experimentally demonstrated a new type of compact single-beam elliptically polarized atomic magnetometers(EPAMs).Employing the fabricated chiral beam splitter PGM with high cross-polarization transmittance,a new atomic spin chirality detection method was devised,enabling the ultra-high sensitivity for extremely weak magnetic field measurement and achieving a high sensitivity of 2.67 pT/Hz^(1/2)under an external magnetic field of approximately 10,000 nT.The new AMs combine the pumping and probing polarized light,achieving a compact design.The fabricated PGM has a size of only 3 mm×3 mm×0.7 mm,which is beneficial for the miniaturization and integration of AMs.This work effectively expands the application of metasurfaces in the field of quantum precision measurement,and also provides a new viewpoint for the design and development of high-sensitivity and miniaturized AMs.展开更多
We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers,which is different from the traditional configuration.A linearly polarized laser with i...We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers,which is different from the traditional configuration.A linearly polarized laser with intensity modulation interacts with electron spins,generating optical rotation angles.Through differential amplification and demodulation,atomic spin polarization information is extracted with high precision.The effectiveness of the proposed method is verified by applying external perturbations during testing.Compared to traditional detection methods,the proposed approach effectively enhances inertial measurement sensitivity.Specifically,at 1 Hz,the measurement sensitivity has improved from9.7×10^(-6)to 3.25×10^(-6)deg/(s Hz^(1/2)).Furthermore,the proposed scheme is easily integrable and conducive to future research on miniaturizing co-magnetometers and can also be applied to many other related fields.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11427902 and 11674063)the National Key Research and Development Program of China(Grant No.2016YFA0300904)
文摘Over the past few decades, spin detection and manipulation at the atomic scale using scanning tunneling microcopy has matured, which has opened the possibility of realizing spin-based functional devices with single atoms and molecules.This article reviews the principle of spin polarized scanning tunneling microscopy and inelastic tunneling spectroscopy,which are used to measure the static spin structure and dynamic spin excitation, respectively. Recent progress will be presented, including complex spin structure, magnetization of single atoms and molecules, as well as spin excitation of single atoms, clusters, and molecules. Finally, progress in the use of spin polarized tunneling current to manipulate an atomic magnet is discussed.
基金supported by the Zhejiang Provincial Science and Technology Plan(“Jianbing and Lingyan”)project(Grant No.2024C01099)Beijing Natural Science Foundation-Non-Consensus Innovation Project(Grant No.F251046)+1 种基金National Natural Science Fund for Excellent Young Scientists Fund Program(Grant No.KZ37124001)the National Natural Science Foundation of China(Grant No.42388101).
文摘The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement.By applying the phasegradient metasurface(PGM)to atomic magnetometers(AMs),we have proposed and experimentally demonstrated a new type of compact single-beam elliptically polarized atomic magnetometers(EPAMs).Employing the fabricated chiral beam splitter PGM with high cross-polarization transmittance,a new atomic spin chirality detection method was devised,enabling the ultra-high sensitivity for extremely weak magnetic field measurement and achieving a high sensitivity of 2.67 pT/Hz^(1/2)under an external magnetic field of approximately 10,000 nT.The new AMs combine the pumping and probing polarized light,achieving a compact design.The fabricated PGM has a size of only 3 mm×3 mm×0.7 mm,which is beneficial for the miniaturization and integration of AMs.This work effectively expands the application of metasurfaces in the field of quantum precision measurement,and also provides a new viewpoint for the design and development of high-sensitivity and miniaturized AMs.
基金supported by the National Natural Science Foundation of China(No.62103026)the Innovation Program for Quantum Science and Technology(Nos.2021ZD0300400 and 2021ZD0300402)the China National Funds for Distinguished Young Scientists(No.61925301)。
文摘We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers,which is different from the traditional configuration.A linearly polarized laser with intensity modulation interacts with electron spins,generating optical rotation angles.Through differential amplification and demodulation,atomic spin polarization information is extracted with high precision.The effectiveness of the proposed method is verified by applying external perturbations during testing.Compared to traditional detection methods,the proposed approach effectively enhances inertial measurement sensitivity.Specifically,at 1 Hz,the measurement sensitivity has improved from9.7×10^(-6)to 3.25×10^(-6)deg/(s Hz^(1/2)).Furthermore,the proposed scheme is easily integrable and conducive to future research on miniaturizing co-magnetometers and can also be applied to many other related fields.
