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Updated: Oct 29, 2025
08:53
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
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Ultrafast extreme ultraviolet photoemission electron microscope
Wei Zheng1, Pengzuo Jiang1, Linfeng Zhang1
1State Key Laboratory for Mesoscopic Physics and Frontiers Science, Center for Nano-Optoelectronics, School of Physics, Peking University, Beijing 100871, China.
The Review of Scientific Instruments
|July 10, 2021
Summary
We developed a new table-top ultrafast extreme ultraviolet (EUV) photoemission electron microscope. This advanced tool offers ultrahigh time, space, and energy resolution for studying electron dynamics in solid materials.
Area of Science:
- Physics
- Materials Science
- Surface Science
Background:
- Ultrafast electron dynamics in solids are crucial for understanding material properties.
- Existing techniques often lack the required spatiotemporal and energy resolution.
- Table-top instruments are desirable for broader accessibility.
Purpose of the Study:
- To report the development of a novel table-top ultrafast extreme ultraviolet (EUV) photoemission electron microscope.
- To demonstrate its capability for high-resolution imaging and analysis of electron dynamics.
Main Methods:
- Generation of coherent ultrafast EUV light via high harmonic generation from femtosecond laser-noble gas interaction in a hollow core fiber.
- Selection of a single harmonic order using an off-plane mount grating.
- Focusing the EUV light onto a sample within an ultrahigh vacuum chamber.
- Calibration of spatial and energy resolution using gold and copper samples.
Main Results:
- Successful construction of a table-top ultrafast EUV photoemission electron microscope.
- Achieved spatial resolution better than 50 nm.
- Achieved energy resolution better than 300 meV.
- Demonstrated capability for studying electron dynamics across the full Brillouin zone.
Conclusions:
- The developed microscope is an advanced tool for ultrafast electron dynamics studies.
- It offers unprecedented combined time, space, and energy resolution.
- Enables detailed investigation of electronic properties in solid materials.
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