Observation of phase boundaries in spontaneous optical pattern formation

Ming Shen,1,2 Yonan Su,1 Ray-Ching Hong,1 YuanYao Lin,1 Chien-Chung Jeng,3 Ming-Feng Shih,4 and Ray-Kuang Lee1 1Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu 300, Taiwan 2Department of Physics, Shanghai University, Shanghai 200444, China 3Department of Physics, National Chung-Hsing University, Taichung 402, Taiwan 4Department of Physics, National Taiwan University, Taipei 106, Taiwan (Received 6 November 2014; published 6 February 2015)