title: Monolithic phononic crystals with a surface acoustic band gap from surface phonon-polariton coupling.
abstract: We theoretically and experimentally demonstrate the existence of complete surface acoustic wave band gaps in surface phonon-polariton phononic crystals, in a completely monolithic structure formed from a two-dimensional honeycomb array of hexagonal shape domain-inverted inclusions in single crystal piezoelectric Z-cut lithium niobate. The band gaps appear at a frequency of about twice the Bragg band gap at the center of the Brillouin zone, formed through phonon-polariton coupling. The structure is mechanically, electromagnetically, and topographically homogeneous, without any physical alteration of the surface, offering an ideal platform for many acoustic wave applications for photonics, phononics, and microfluidics.
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, VIC 3001 Melbourne, Australia.
authors.forename: D
authors.initials: D
authors.lastname: Yudistira
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, VIC 3001 Melbourne, Australia and ARC Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems, RMIT University, VIC 3001 Melbourne, Australia.
authors.forename: A
authors.initials: A
authors.lastname: Boes
authors.affiliation: Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Université de Lille 1, 59655 Villeneuve d'Ascq Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Djafari-Rouhani
authors.affiliation: Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Université de Lille 1, 59655 Villeneuve d'Ascq Cedex, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Pennec
authors.affiliation: Micro/Nanophysics Research Laboratory, RMIT University, VIC 3001 Melbourne, Australia.
authors.forename: L Y
authors.initials: LY
authors.lastname: Yeo
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, VIC 3001 Melbourne, Australia and ARC Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems, RMIT University, VIC 3001 Melbourne, Australia.
authors.forename: A
authors.initials: A
authors.lastname: Mitchell
authors.affiliation: Micro/Nanophysics Research Laboratory and the Micro Nano Research Facility, RMIT University, VIC 3001 Melbourne, Australia and Department of Mechanical and Aerospace Engineering, University of California-San Diego, La Jolla, California 92093, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Friend