On continuously defective elastic crystals

Polarizing beam-splitter based on defective photonic crystals

The performance of a polarizing beam splitter based on the one-dimensional photonic crystals (1D-PCs), is theoretically investigated. The polarizing beam splitter consists of a symmetric stack of the low-index quarter-wave plates and the high-index half-wave plates with a central defect layer of air. The linear transmission properties of the polarizing beam splitter are numerically simulat...

Topological transitions in continuously-deformed photonic crystals

We demonstrate that multiple topological transitions that occur, with high-sensitivity, by continuous change in geometry of a simple 2D dielectric-frame photonic crystal consisting of circular air-holes. These transitions are characterized by the switch between the frequencies of the pand d-orbital Bloch modes encompassing the photonic band gap (PBG). By tuning the radii of the holes and/or the...

Equilibrium configurations of defective crystals

Phase-field crystals with elastic interactions.

We report on a novel extension of the recently introduced phase-field crystal (PFC) method [Elder, Phys. Rev. Lett. 88, 245701 (2002)10.1103/PhysRevLett.88.245701], which incorporates elastic interactions as well as crystal plasticity and diffusive dynamics. In our model, elastic interactions are mediated through wave modes that propagate on time scales many orders of magnitude slower than atom...

Elastic crystals with a triple point

The peculiar behavior of active crystals is due to the presence of evolving phase mixtures the variety of which depends on the number of coexisting phases and the multiplicity of symmetryrelated variants. According to Gibbs’ phase rule, the number of phases in a single-component crystal is maximal at a triple point in the p-T phase diagram. In the vicinity of this special point the number of me...