Phononic First Band Gap of Quaternary Layered Periodic Structure with the Lumped-Mass Method

Three-dimensionally periodic dielectric layered structure with omnidirectional photonic band gap

A three-dimensionally periodic dielectric structure with a large complete photonic band gap ~PBG! is presented. The structure is distinguished by a sequence of planar layers, identical except for a horizontal offset, and repeating every three layers to form an fcc lattice. The layers can be thought of as an alternating stack of the two basic two-dimensional ~2D! PBG slab geometries: rods in air...

Band-Gap Structure of the Spectrum of Periodic Maxwell Operators

We investigate the band-gap structure of some second-order differential operators associated with the propagation of waves in periodic two-component media. Particularly, the operator associated with the Maxwell equations with position-dependent dielectric constant e(x), x e R 3, is considered. The medium is assumed to consist of two components: the background, where e(x)= eh, and the embedded c...

A 1D Optomechanical crystal with a complete phononic band gap

Recent years have witnessed the boom of cavity optomechanics, which exploits the confinement and coupling of optical and mechanical waves at the nanoscale. Amongst their physical implementations, optomechanical (OM) crystals 4,5 built on semiconductor slabs enable the integration and manipulation of multiple OM elements in a single chip and provide GHz phonons suitable for coherent phonon manip...

Band-gap design of quaternary (In,Ga)(As,Sb) semiconductors via the inverse-band-structure approach.

Quaternary systems illustrated by (Ga,In)(As,Sb) manifest a huge configurational space, offering in principle the possibility of designing structures that are lattice matched to a given substrate and have given electronic properties (e.g., band gap) at more than one composition. Such specific configurations were however, hitherto, unidentified. We show here that using a genetic-algorithm search...

12 Photonic and Phononic Band Gap Properties of Lithium Niobate