Electron Microscopy Probing Electron-Photon Interactions in SiC Nanowires with Ultrawide Energy and Momentum Match.
Jinlong DuJin-Hui ChenYuehui LiRuochen ShiMei WuYun-Feng XiaoPeng GaoPublished in: Nano letters (2022)
Light-matter interactions are commonly probed by optical spectroscopy, which, however, has some fundamental limitations such as diffraction-limited spatial resolution, tiny momentum transfer, and noncontinuous excitation/detection. In this work, through the use of scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS) with ultrawide energy and momentum match and subnanometer spatial resolution, the longitudinal Fabry-Perot (FP) resonating modes and the transverse whispering-gallery modes (WGMs) in individual SiC nanowires are simultaneously excited and detected, which span from near-infrared (∼1.2 μm) to ultraviolet (∼0.2 μm) spectral regime, and the momentum transfer can range up to 10 8 cm -1 . The size effects on the resonant spectra of nanowires are also revealed. This work provides an alternative technique to optical resonating spectroscopy and light-matter interactions in dielectric nanostructures, which is promising for modulating free electrons via photonic structures.
Keyphrases
- electron microscopy
- single molecule
- high resolution
- room temperature
- high speed
- living cells
- reduced graphene oxide
- energy transfer
- molecular dynamics simulations
- solid state
- mass spectrometry
- electron transfer
- signaling pathway
- magnetic resonance
- heart failure
- cross sectional
- replacement therapy
- gold nanoparticles
- real time pcr
- left ventricular
- hypertrophic cardiomyopathy
- density functional theory
- loop mediated isothermal amplification
- smoking cessation
- dual energy
- atrial fibrillation