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Title: Absorption-reduced waveguide structure for efficient terahertz generation

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.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [3] ;  [3]
  1. Institute of Physics, University of Pécs, Ifjúság ú. 6, 7624 Pécs (Hungary)
  2. MTA-PTE High-Field Terahertz Research Group, Ifjúság ú. 6, 7624 Pécs (Hungary)
  3. (Hungary)
Publication Date:
OSTI Identifier:
22486211
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; EFFICIENCY; FIBERS; LASERS; LOSSES; MATERIALS; MHZ RANGE; NONLINEAR PROBLEMS; PULSES; STRUCTURE FUNCTIONS; WAVEGUIDES