Chaos-assisted nonresonant optical pumping of quadrupole-deformed   microlasers
  Efficient nonresonant optical pumping of a high-Q scar mode in a two-dimensional quadrupole-deformed microlaser has been demonstrated based on ray and wave chaos. Three-fold enhancement in the lasing power was achieved at a properly chosen pumping angle. The experimental result is consistent with ray tracing and wave overlap integral calculations. 
Sang-Bum Lee, Jeong-Bo Shim, Sang Wook Kim, Juhee Yang, Hai-Woong Lee,   Jai-Hyung Lee, and Kyungwon An