Generation of coherent terahertz radiation with multifrequency modes in a Fibonacci optical superlattice

Yi-qiang Qin; Hong Su; Sing-hai Tang, Bozena
August 2003
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1071
Academic Journal
We investigate theoretically the generation of coherent narrow-band terahertz (THz) radiation with multifrequency modes in an optical superlattice produced by quasiperiodically poled ferroelectric crystal. The superlattice consists of two building blocks A and B, in which each containing a pair of antiparallel 180° ferroelectric domains, arranged as a Fibonacci sequence. Second-order nonlinear optical rectification of femtosecond pulses gives rise to a THz wave form whose multifrequency modes are determined by the quasiperiodic structure properties. The relationship between multifrequency modes terahertz generation and Fibonacci structure parameters is also analyzed and studied. © 2003 American Institute of Physics.


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