title: Active holography in InGaAs/InP quantum-well microcavities.
abstract: High-efficiency dynamic holography at 1.55 μm is demonstrated in a broad-area InGaAs/InP multiple-quantum-well vertical microcavity. The design places single quantum wells at the cavity antinodes, reducing mode-pulling and enabling a higher Q-factor. The device is pumped by interference fringes through an amorphous mirror that is transparent to a high-energy hologram writing pulse at a wavelength of 1.06 μm. Optically pumped free carrier gratings are probed by a tunable 1.5 μm laser in a four-wave mixing configuration. Diffraction efficiency into both m=±1 diffraction orders of 35% (70% total) has been obtained with a phase grating contribution approaching the maximum π phase shift by combining absorption bleaching with asymmetric Fabry-Perot reflectivity. The diffracted signal exhibits rise/fall times of 5 ns, demonstrating the high speed capabilities of this device.
authors.affiliation: Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA. sun81@purdue.edu
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.forename: David D
authors.initials: DD
authors.lastname: Nolte
authors.forename: James
authors.initials: J
authors.lastname: Hyland
authors.forename: Eric
authors.initials: E
authors.lastname: Harmon