Quasicrystalline structures and uses thereof
This invention relates generally to the field of quasicrystalline strictures. In preferred embodiments, the stopgap structure is more spherically symmetric than periodic structures facilitating the formation of stopgaps in nearly all directions because of higher rotational symmetries. More particularly, the invention relates to the use of quasicrystalline structures for optical, mechanical, electrical and magnetic purposes. In some embodiments, the invention relates to manipulating, controlling, modulating and directing waves including electromagnetic, sound, spin, and surface waves, for pre-selected range of wavelengths propagating in multiple directions.
1. A method comprising: a) providing a quasicrystalline composition comprising material elements in which waves are oriented in different directions; and b) arranging said material elements into a quasi-periodic pattern that modulates sound waves, wherein said quasicrystalline composition has at least a five-fold symmetry axis and not a six-fold symmetry axis; and said quasicrystalline composition is a dielectric heterostructure that exhibits a phononic band structure of corresponding symmetry, forbidden in crystals in a two- or three-dimensional space, and characterized by a complete band gap.
2. A device comprising a quasicrystalline composition comprising material elements in which waves are oriented in different directions, wherein said material elements are arranged in a quasi-periodic pattern that modulates sound waves, wherein said quasicrystalline composition has at least a five-fold symmetry axis and not a six-fold symmetry axis; and said quasicrystalline composition is a dielectric heterostructure that exhibits a phononic band structure of corresponding symmetry, forbidden in crystals in a two- or three-dimensional space, and characterized by a complete band gap, so as to produce the device.