2018年9月6日 · Here, we use SNOM to investigate the nanoscale optical response through the temperature-driven IMT of VO 2 films grown on sapphire. Our key innovation is to perform this experiment at both...

2015年11月23日 · In this article, we develop a method to reconstruct the vertical characteristics of the interaction between the tip and the sample in s-SNOM. This approach is inspired by a technique used in...

2007年12月14日 · Scanning near-field infrared microscopy allows us to directly image nanoscale metallic puddles that appear at the onset of the insulator-to-metal transition. In combination with far-field infrared spectroscopy, the data reveal the Mott transition with divergent quasi-particle mass in the metallic puddles.

2024年7月17日 · Scattering-type scanning near-field optical microscopy (s-SNOM) has mapped the stress-tuned periodic domain patterns in VO 2 microcrystals, while the combination of transient measurements with near-field imaging has revealed the ultrafast dynamics and phase inhomogeneities associated with MIT.

2016年4月20日 · Here we demonstrate the combination of ultrafast nondegenerate pump–probe spectroscopy with far from equilibrium excitation, and scattering scanning near-field optical microscopy (s-SNOM) for ultrafast nanoimaging.

2016年10月17日 · Scattering-type scanning near-field optical microscopy (s-SNOM) allows spectroscopic imaging with spatial resolution below the diffraction limit. With suitable...

2021年11月1日 · Time-resolved scanning near-field optical microscopy (Tr-SNOM) is used to study VO 2 across a wide parameter space of infrared frequencies, picosecond time scales, and elevated steady-state temperatures with nanoscale spatial resolution. Room temperature, steady-state, phonon enhanced nano-optical contrast reveals preexisting “hidden” disorder.

2021年11月10日 · We investigate transient nanotextured heterogeneity in vanadium dioxide (VO₂) thin films during a light-induced insulator-to-metal transition (IMT). Time-resolved scanning near-field optical microscopy (Tr-SNOM) is used to study VO₂ across a wide parameter space of infrared fre …

科研人员用该系统成功获取了一个热周期内的THz和MIR频率的VO2 （氧化铝基底）非金属-金属相变SNOM 图像（刻度线2um）。 此外，该团队通过比对温度变化下，VO2材料的THz和MIR频率的光谱信息，观察到一个更为渐进的相变过程。

2017年11月14日 · We use apertureless scattering near-field optical microscopy (SNOM) to investigate the nanoscale optical response of vanadium dioxide (VO2) thin films through a temperature-induced insulator-to-metal transition (IMT).