Observation of lower to higher bandgap transition of one-dimensional defect modes.
We demonstrate one-dimensional optically-induced photonic lattices with a negative defect and observe linear bandgap guidance in such a defect. We show that a defect mode moves from the first bandgap to a higher bandgap as the lattice potential is increased. Our experimental results are in good agreement with the theoretical analysis of these effects.
Wang
Xiaosheng
X
Department of Physics and Astronomy, San Francisco State University, CA 94132, USA.
Young
Jack
J
Chen
Zhigang
Z
Weinstein
Doug
D
Yang
Jianke
J
D004867:Equipment Design; D008422:Materials Testing / Q000379:methods*; D036103:Nanotechnology / Q000295:instrumentation*; D055095:Optics and Photonics / Q000295:instrumentation*