Single-cycle terahertz pulses with >0.2 V/A field amplitudes via coherent transition radiation

Journal Article · Mon Oct 03 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3646399· OSTI ID:22027759

Daranciang, Dan ^[1]; Goodfellow, John ^[2]; Fuchs, Matthias; Ghimire, Shambhu ^[3]; Wen, Haidan ^[4]; Reis, David A ^[3]; Loos, Henrik; Fisher, Alan S ^[5]; Lindenberg, Aaron M ^[3]

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1. Department of Chemistry, Stanford University, Stanford, California 94305 (United States)
2. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 (United States)
3. PULSE Institute for Ultrafast Energy Science, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)
4. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
5. Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)

We demonstrate terahertz pulses with field amplitudes exceeding 0.2 V/A generated by coherent transition radiation. Femtosecond, relativistic electron bunches generated at the Linac Coherent Light Source are passed through a beryllium foil, and the emitted radiation is characterized as a function of the bunch duration and charge. Broadband pulses centered at a frequency of 10 THz with energies of 140 {mu}J are measured. These far-below-bandgap pulses drive a nonlinear optical response in a silicon photodiode, with which we perform nonlinear autocorrelations that yield information regarding the terahertz temporal profile. Simulations of the spatiotemporal profile agree well with experimental results.

• OSTI ID: 22027759
• Journal Information: Applied Physics Letters, Vol. 99, Issue 14; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM
COMPUTERIZED SIMULATION
CORRELATIONS
ELECTRIC FIELDS
ELECTRONS
FOILS
NONLINEAR OPTICS
NONLINEAR PROBLEMS
PHOTODIODES
PULSED IRRADIATION
SILICON
THIN FILMS
THZ RANGE
TIME DEPENDENCE
TRANSITION RADIATION
VISIBLE RADIATION