Parametric and cascaded parametric interactions in a quasiperiodic optical superlattice

Abstract

Quasi-phase-matching optical parametric and cascaded parametric processes in a two-component quasiperiodic superlattice were studied in theory and experiment. This letter demonstrates how to obtain red at 666 nm and blue at 443 nm simultaneously from the superlattice using a 532 nm laser as a pump through these two processes mentioned above. The result confirms that some nonlinear frequency conversion processes occurring in a high-dimension χ(2) nonlinear photonic crystal may be efficiently achieved in such a one-dimension quasiperiodic optical superlattice.

Ice Surface Reconstruction as Antifreeze Protein-Induced Morphological Modification Mechanism

“…Ice should first experience ice nucleation, followed by growth. Whether or not freezing takes place is determined to a large extent by ice nucleation. , There is evidence that fish antifreeze proteins bind to and reduce the efficiency of heterogeneous nucleation sites, rather than binding to embryonic ice nuclei. , Similar phenomena were obtained and explained in refs −5. The antifreeze action of the AFP is actually first to inhibit the nucleation by terminating the relevant kinetics. − When the inhibition of ice nucleation fails, the AFP proceeds to inhibit the growth of ice.…”

Three-Color Continuous-Variable Entanglement Directly Produced in an Optical Superlattice

“…G 1 and G 2 are determined by the parameters of superlattice. The first quasiphase-matching (QPM) [28][29][30] condition for the parametric down-conversion process is ∆k = k p − k 1 − k 3 − G 1 = 0. The second QPM condition for the sum-frequency generation is ∆k = k 2 − k p − k 3 − G 2 = 0.…”

“…The threecolor CV entanglement is experimentally feasible for this cascaded nonlinear process in a quasiperiodic superlattice has been realized by a single-pass QPM process in our laboratory. 30 We think this scheme of three-color CV entanglement directly generation by only one pump and a single superlattice is very significant for the application in quantum information and quantum communication.…”

One to many one-way control in quadripartite asymmetric Einstein-Podolsky-Rosen steering

“…The damping rates γ is related to the reflection transmission coefficient of the optical cavity for r i = 1 − γ i and t i = √ 2γ i [39] and the value can be changed by changing the transmission and reflection system of the coupling cavity mirror. The nonlinear coupling parameter κ in our scheme can be changed by designing the parameters of optical superlattice [37,40], which is the advantage of our scheme over the previous atomic system scheme. Therefore, different kinds of asymmetric EPR steering can be obtained by choosing different nonlinear parameters.…”

“…Therefore, different kinds of asymmetric EPR steering can be obtained by choosing different nonlinear parameters. Optical parametric down-conversion cascaded with a sum-frequency generation without [40] and with [41] optical cavity both have been realized in previous experiments. Multiple beam resonances of different frequencies have also been experimentally achieved [42].…”