Acoustic beam splitting at low GHz frequencies in a defect-free phononic crystal
نویسندگان
چکیده
The directional waveguiding in a 2D phononic crystal is simulated based on the analysis of equifrequency contours. This approach is utilized to investigate acoustic beam splitting in a defectfree nanostructure in the low GHz range. We find relaxed limitations regarding the source parameters compared to similar approaches in the sonic regime. Finally, we discuss the possibility to design an acoustic interferometer device at the nanoscale at GHz frequencies. Published by AIP Publishing.
منابع مشابه
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...
متن کاملInterface modes in nanostructured metal-dielectric metamaterials
Related Articles Prediction of vibrational frequencies of possible intermediates and side products of the methanol synthesis on ZnO(000) by ab initio calculations J. Chem. Phys. 136, 034706 (2012) Near-constant resistivity in 4.2-360 K in a B2 Al2.08CoCrFeNi AIP Advances 2, 012111 (2012) Negative refraction of elastic waves in 2D phononic crystals: Contribution of resonant transmissions to the ...
متن کاملColloidal nanocrystal superlattices as phononic crystals: plane wave expansion modeling of phonon band structure
Colloidal nanocrystals consist of an inorganic crystalline core with organic ligands bound to the surface and naturally self-assemble into periodic arrays known as superlattices. This periodic structure makes superlattices promising for phononic crystal applications. To explore this potential, we use plane wave expansion methods to model the phonon band structure. We find that the nanoscale per...
متن کاملAcoustic confinement and waveguiding with a line-defect structure in phononic crystal slabs
We present a new way of forming phononic crystal waveguides by coupling a series of line-defect resonators. The dispersion proprieties of these coupled resonator acoustic waveguides ͑CRAW͒ can be engineered by using their geometrical parameters. We show that single-mode guiding over a large bandwidth is possible in CRAW formed in a honeycomb-lattice phononic crystal slab of holes in zinc oxide. I...
متن کاملRainbow trapping of ultrasonic guided waves in chirped phononic crystal plates
The rainbow trapping effect has been demonstrated in electromagnetic and acoustic waves. In this study, rainbow trapping of ultrasonic guided waves is achieved in chirped phononic crystal plates that spatially modulate the dispersion, group velocity, and stopband. The rainbow trapping is related to the progressively slowing group velocity, and the extremely low group velocity near the lower bou...
متن کامل