Experimental demonstration of a high quality factor photonic crystal microcavity

fonts rotating euscript subfigure enumerate hhline threeparttable supertabular [1]1 [1]1 [1]1 [1]1 [1]1 [1]1 [1]∇× 1RTGG0kGkRaibGgDDDD{dν |sν}÷[1]∇ · 1[1]∇1 document apsrev Experimental demonstration of a high quality factor photonic crystal microcavity Kartik Srinivasan Paul E. Barclay Oskar Painter Department of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA. phone: (626) 395-6269, fax: (626) 795-7258, e-mail: [email protected] Jianxin Chen Alfred Y. Cho Claire Gmachl Bell Laboratories, Lucent Technology, 600 Mountain Avenue, Murray Hill, New Jersey 07974, USA. abstract Sub-threshold measurements of a photonic crystal (PC) microcavity laser operating at 1.3 μm show a linewidth of 0.10 nm, corresponding to a quality factor (Q) ∼ 1.3x10. The PC microcavity mode is a donor-type mode in a graded square lattice of air holes, with a theoretical Q ∼ 10 and mode volume Veff ∼ 0.25 cubic half-wavelengths in air. Devices are fabricated in an InAsP/InGaAsP multi-quantum well membrane and are optically pumped at 830 nm. External peak pump power laser thresholds as low as 100 μW are also observed.