Volume 99, Issue 6, 15 March 2006
Index of content:
- LASERS, OPTICS, AND OPTOELECTRONICS
99(2006); http://dx.doi.org/10.1063/1.2183355View Description Hide Description
Photon pairs with correlated frequencies from an optical parametric system were generated by a continuous wave pump focused on a type-II nonlinear crystal with polarizationentanglement. The polarizationentanglement of the frequency resolved photons was measured under several typical configurations. By optimizing a condition, the degree of polarizationentanglement was improved substantially. We proposed the application of the system, which can be used as a light source of wavelength division multiplexingquantum key distribution, optimizing the configuration of the photon-pair generation.
99(2006); http://dx.doi.org/10.1063/1.2183410View Description Hide Description
The ability of a traveling periodic optical potential to increase the thrust and specific impulse of microthrusters is investigated. Two flow regimes, high density and low density, are considered. The thrust from a micronozzle, with a stagnation pressure of and temperature of , can be increased by more than an order of magnitude. These conditions can be achieved for a constant velocity lattice, produced by two near counterpropagating optical fields that are focused into the nozzle throat. A propulsion system that operates in low-density regime and is driven by molecules trapped by an acceleratingoptical lattice is proposed. It is shown that such a system has a potential to achieve a specific impulse of thousands of seconds.
99(2006); http://dx.doi.org/10.1063/1.2184432View Description Hide Description
The effect of both single-photon and two-photon absorption mechanisms on the Kerr-nonlinear behavior of resonant structures is investigated using a semianalytical, one-dimensional model. In particular, two-photoneffects may severely degrade the ultrafast, nonlinear potential of these structures. Based on this model, the feasibility of Kerr-nonlinear operation is derived for the AlGaAs and Si material systems.
Analytical and numerical calculations of the dispersion characteristics of two-dimensional dielectric photonic band gap structures99(2006); http://dx.doi.org/10.1063/1.2186385View Description Hide Description
An exact analytical dispersion relation is derived for transverse-magnetic modes with in a particular two-dimensional rectangular photonic band gapstructure. The dispersion relation is analyzed, and the dispersion characteristics are determined. Analytical results are compared with results from the Massachusetts Institute of Technology Photonic Band GapStructure Simulator (PBGSS) code. The error tolerance in the PBGSS code is established. Finally, the attenuations of modes with frequencies in global band gaps are computed analytically.