Related Experiment Video
Updated: Jul 10, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Cavity-enhanced noncollinear high-harmonic generation for extreme ultraviolet frequency combs
1State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China. jwu@phy.ecnu.edu.cn
Optics Letters
|November 21, 2007
Summary
We present an efficient method for generating extreme ultraviolet frequency combs using cavity-enhanced noncollinear high-harmonic generation. Phase matching is key to high efficiency, depending on crossing angle, ionization, and atomic density.
Area of Science:
- Quantum optics
- Nonlinear optics
- Ultrafast science
Background:
- Extreme ultraviolet (XUV) light sources are crucial for spectroscopy and attosecond science.
- Generating high-energy XUV radiation efficiently remains a challenge.
Purpose of the Study:
- To investigate an efficient scheme for generating and outcoupling XUV frequency combs.
- To understand the critical parameters influencing conversion and output-coupling efficiencies.
Main Methods:
- Cavity-enhanced noncollinear high-harmonic generation.
- Numerical simulations to analyze phase-matching conditions.
Main Results:
- Phase matching is identified as a critical factor for high energy conversion and output-coupling efficiencies.
- Efficiencies are strongly dependent on the crossing angle, ionization probability, and initial atomic density.
Conclusions:
- The proposed scheme offers an efficient route to XUV frequency combs.
- Precise control over experimental parameters is essential for optimizing performance.
Related Concept Videos
01:10Generating Electromagnetic Radiations
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 the...
01:28Standing Waves in a Cavity
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
01:22Carrier Generation and Recombination
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...