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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Terahertz radiation from a nonlinear slab traversed by an optical pulse
N N Zinov'ev1, A S Nikoghosyan, J M Chamberlain
1Department of Physics, University of Durham, Durham DH1 3LE, United Kingdom. nick.zinovev@durham.ac.uk
Physical Review Letters
|March 16, 2007
Summary
Theoretical calculations reveal that optical pulses in nonlinear materials generate radiation similar to moving charged particles. This finding highlights parallels between nonlinear wave interactions and phenomena like transition radiation.
Area of Science:
- Nonlinear optics
- Electromagnetic theory
- Theoretical physics
Background:
- Optical pulses propagating through materials can exhibit nonlinear behavior.
- Radiation phenomena from moving charges are well-established in physics.
- The Tamm Problem and transition radiation describe specific instances of such phenomena.
Purpose of the Study:
- To theoretically investigate collinear electromagnetic radiation during optical pulse propagation in nonlinear materials.
- To compare the characteristics of radiation from nonlinear wave interactions with known radiation phenomena of moving charges.
Main Methods:
- Theoretical calculations of electromagnetic radiation.
- Analysis of optical pulse propagation through a nonlinear material slab.
- Waveform analysis of the radiated field.
Main Results:
- Calculated waveforms of the radiated field exhibit strong agreement with experimental data.
- Demonstrated remarkable similarities between radiation in nonlinear wave interactions and radiation from moving external charges.
- The observed phenomena are analogous to those discussed in the Tamm Problem and transition radiation.
Conclusions:
- Nonlinear optical pulse propagation generates radiation with characteristics strikingly similar to those of moving charges.
- This study provides a theoretical framework connecting nonlinear wave phenomena with classical electrodynamics of moving charges.
- The findings offer new insights into the fundamental physics of light-matter interactions in nonlinear media.
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