Related Experiment Video
Updated: Mar 27, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
15.4K
Generation of attosecond electron packets via conical surface plasmon electron acceleration
1Ultrafast Optics and Nanophotonics Laboratory Department of Electrical and Computer Engineering University of Alberta Edmonton, AB T6G 1H9 Canada.
Scientific Reports
|January 15, 2016
Summary
We developed a new method to generate high-energy electron packets using surface plasmons (SP) and laser-electron interactions. This technique filters accelerated electrons for advanced applications in ultrafast science.
Area of Science:
- Physics, Applied
- Optics
- Materials Science
Background:
- Ultrafast electron generation is crucial for probing dynamic processes.
- Surface plasmon (SP) excitation offers a pathway for compact electron acceleration.
Purpose of the Study:
- To present a novel method for generating high kinetic energy attosecond electron packets.
- To characterize these electron packets using advanced modeling techniques.
Main Methods:
- Excitation of conical surface plasmon (SP) waves using a radially polarized laser.
- Coupling the laser to a conical silica lens coated with a silver (Ag) film.
- Magnetostatic and aperture filtering of the SP-accelerated electrons.
Main Results:
- Successful generation of high kinetic energy attosecond electron packets.
- Characterization of electron packet properties using electromagnetic and particle tracking models.
Conclusions:
- The presented method enables efficient generation of ultrafast electron beams.
- This technique has potential applications in advanced scientific imaging and spectroscopy.
Related Concept Videos
01:22Carrier Generation and Recombination
1.5K
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
1.5K
01:15Van de Graaff Generator
2.8K
Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
2.8K
01:10Generating Electromagnetic Radiations
8.4K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
8.4K
01:15Transmission Electron Microscopy
7.9K
In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
7.9K
01:20Atomic Emission Spectroscopy: Overview
4.2K
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...
4.2K
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
2.3K
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
2.3K