Absorption-reduced waveguide structure for efficient terahertz generation

Journal Article · Mon Dec 07 04:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4937347· OSTI ID:22486211

Fülöp, J. A. ^[1]; Hebling, J. ^[2]

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1. MTA-PTE High-Field Terahertz Research Group, Ifjúság ú. 6, 7624 Pécs (Hungary)
2. Institute of Physics, University of Pécs, Ifjúság ú. 6, 7624 Pécs (Hungary)

An absorption-reduced planar waveguide structure is proposed for increasing the efficiency of terahertz (THz) pulse generation by optical rectification of femtosecond laser pulses with tilted-pulse-front in highly nonlinear materials with large absorption coefficient. The structure functions as waveguide both for the optical pump and the generated THz radiation. Most of the THz power propagates inside the cladding with low THz absorption, thereby reducing losses and leading to the enhancement of the THz generation efficiency by up to more than one order of magnitude, as compared with a bulk medium. Such a source can be suitable for highly efficient THz pulse generation pumped by low-energy (nJ-μJ) pulses at high (MHz) repetition rates delivered by compact fiber lasers.

• OSTI ID: 22486211
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 23 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
EFFICIENCY
FIBERS
LASERS
LOSSES
MATERIALS
MHZ RANGE
NONLINEAR PROBLEMS
PULSES
STRUCTURE FUNCTIONS
WAVEGUIDES