We demonstrate that interference-assisted coalescence of two noncollinearly overlapped filaments creates a wavelength-scale periodic plasma density modulation to guide the input pulses equivalently as a photonic crystal plasma waveguide. The periodic self-channeling is evidenced by the direct observation of the filament coalescence, which reveals wavelength-scale spatial widths and periodicity dependent on the crossing angles and intensity ratios between the incident filaments.
© 2009 Optical Society of America
Original Manuscript: August 27, 2009
Revised Manuscript: October 4, 2009
Manuscript Accepted: October 16, 2009
Published: December 7, 2009
Xuan Yang, Jian Wu, Yan Peng, Yuqi Tong, Peifen Lu, Liang'en Ding, Zhizhan Xu, and Heping Zeng, "Plasma waveguide array induced by filament interaction," Opt. Lett. 34, 3806-3808 (2009)