Related Experiment Video
Updated: May 15, 2026
08:53
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
An ultrafast angle-resolved photoemission apparatus for measuring complex materials
Christopher L Smallwood1, Christopher Jozwiak, Wentao Zhang
1Department of Physics, University of California, Berkeley, California 94720, USA.
The Review of Scientific Instruments
|January 3, 2013
Summary
We developed a high-resolution time- and angle-resolved photoemission spectroscopy system for ultrafast electron spectroscopy. This setup achieves excellent energy, momentum, and time resolution, advancing materials science research.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spectroscopy
Background:
- Ultrafast electron spectroscopy is crucial for understanding dynamic processes in materials.
- High-resolution time-resolved photoemission spectroscopy (TR-PES) enables probing electronic structures with femtosecond precision.
Purpose of the Study:
- To present the technical specifications of a novel high-resolution time- and angle-resolved photoemission spectroscopy (TR-ARPES) setup.
- To demonstrate the system's capabilities using data from a cuprate superconductor.
Main Methods:
- Utilized a hemispherical electron analyzer and a cavity-dumped solid-state Ti:sapphire laser.
- Generated synchronized pump (1.48 eV) and probe (5.93 eV) beams with tunable repetition rates (209 Hz to 54.3 MHz).
- Achieved high resolution in energy (23 meV), momentum (0.003 Å⁻¹), and time (310 fs).
Main Results:
- Detailed technical specifications of the TR-ARPES system are provided.
- Representative data showcasing the system's performance on Bi(2)Sr(2)CaCu(2)O(8+δ) are presented.
- The system demonstrates high precision in energy, momentum, and temporal resolution.
Conclusions:
- The developed TR-ARPES system offers advanced capabilities for ultrafast electron spectroscopy.
- This setup will facilitate new research directions in the study of dynamic electronic properties of materials.
- The presented specifications and data serve as a benchmark for future developments in the field.
Related Concept Videos
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
01:22Atomic Emission Spectroscopy: Instrumentation
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
01:20Atomic Emission Spectroscopy: Overview
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...