Terahertz generation by means of optical lasers

✍ Scribed by G.Kh. Kitaeva

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 235 KB
• Volume: 5
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200810039

✦ Synopsis

Generation of high-power radiation in terahertz frequency range 0.3 -10 THz is a fast developing research area attracting considerable interest over the past years due to its important applications in spectroscopy, communication, biomedical imaging and tomography. A brief review of laser-based generation methods is presented, starting from the schemes of resonance laser excitation of photoconductive materials, organic molecules and ionized gases, and proceeding with more detailed description of non-resonance schemes of optical rectification and difference frequency generation in materials with high optical nonlinearity. Recent progress achieved in both groups of methods is compared. Optical pump Crystal Terahertz output x θ θ k 1 k 2 k THz Difference-frequency generation in a bulk non-linear crystal. Schematic diagram and orientations of the wave-vectors inside the crystal