Ultrafast Pump-Probe Nanoscopy for Research on Nanoscale Materials for High-Speed Electronics
Abstract
This equipment proposal is to request a nanoscale, diffraction unlimited, ultrafast imaging and spectroscopy tool for research and research related educational purposes in quantum and nanoscale materials for high-speed electronics applications. Nanoscale ultrafast pump-probe spectroscopy (‘ultrafast nanoscopy’ for short) opens unique capabilities to study the dynamical processes in quantum materials by providing time-resolved spectroscopy with nanoscale spatial resolution, far below the classical resolution limit of traditional technology. Based on nano-FTIR (Fourier transform infrared nanospectroscopy) femtosecond-laser system, ultrafast pump-probe nanoscopy provides a powerful route for capturing time dynamic phenomena in materials at the nanoscale. The integrated ultrafast pump-probe nanoscopy is based on an asymmetric interferometer, where the atomic force microscopy tip and sample are located in one of the interferometer arms which allow detection of amplitude and phase of the tip-scattered light. The dual-beam parabola enables the utilization of light sources spanning a wide frequency range mid- and near-IR, terahertz, visible and even ultraviolet frequencies. Integrated delay lines and pulse synchronization enable accurate temporal overlap of pulses and allow for detecting sample response as a function of time. Spatial resolution depends on the tip apex radius and is typically ~20 nm.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310053
Entities
People
- Yohannes Abate
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Georgia