Title :
Optoelectronic THz generation by third-order non-linearities, in air and air plasmas
Author :
Eden, S. ; Loffler, T. ; Thomson, M. ; Roskos, H.G.
Author_Institution :
Phys. Inst., Johann Wolfgang Goethe Univ., Frankfurt, Germany
Abstract :
Summary form only given. We focused a 150-fs, 775-nm laser pulse with a pulse energy of up to 500 pJ through a 100-/spl mu/m-thick type- I-phase-matched BBO crystal into air. In order to adjust the relative phase between the fundamental and the second harmonic, a thin quartz glass plate is placed inbetween the BBO crystal and the focus. We demonstrated that third order non-linearities in laser-induced plasmas offer a promising source for high-energy THz pulse generation.
Keywords :
barium compounds; optical harmonic generation; optical materials; optical phase matching; optical pulse generation; plasma production by laser; submillimetre wave generation; 100 micron; 150 fs; 500 pJ; 775 nm; BBO crystal; BaB/sub 2/O/sub 4/; fundamental; high-energy THz pulse generation; laser pulse; laser-induced plasmas; pulse energy; second harmonic; thin quartz glass plate; third order nonlinearities; type-I phase-matched crystal; Barium compounds; Optical frequency conversion; Optical materials; Plasma generation;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-708-3
DOI :
10.1109/QELS.2002.1031226
