High efficiency operation of butt joint line-defect-waveguide microlaser in two-dimensional photonic crystal slab

Butt joint line-defect-waveguide microlasers are demonstrated on photonic crystal slabs with airholes in a triangular lattice. Such microlaser is designed to increase the output power from the waveguide edge directly. The output power is remarkably enhanced to 214 times higher by introducing chirped structure in the output waveguide. The lasing mode operates in the linear dispersion region of the output waveguide so that the absorption loss due to the band-edge effect is reduced. The laser resonance is illustrated theoretically using the finite difference time domain method. A practical high power efficiency of 20% is obtained in this microlaser. (C) 2008 American Institute of Physics.

Chinese National Key Basic Research Special Fund (CNKBRSF) 2006CB921700 National High-Technology Research and Development Program of China 2006AA03Z403 National Natural Science Foundation of China (NNSFC) 10634080 60677046This work was supported by the Chinese National Key Basic Research Special Fund (CNKBRSF) (Grant No. 2006CB921700), the National High-Technology Research and Development Program of China (Grant No. 2006AA03Z403), and the National Natural Science Foundation of China (NNSFC) (Grant Nos. 10634080 and 60677046)