Hexagonal Boron Nitride Phononic Crystal Waveguides
arXiv:2001.01321 · doi:10.1021/acsphotonics.9b01094
Abstract
Hexagonal boron nitride (h-BN), one of the hallmark van der Waals (vdW) layered crystals with an ensemble of attractive physical properties, is playing increasingly important roles in exploring two-dimensional (2D) electronics, photonics, mechanics, and emerging quantum engineering. Here, we report on the demonstration of h-BN phononic crystal waveguides with designed pass and stop bands in the radio frequency (RF) range and controllable wave propagation and transmission, by harnessing arrays of coupled h-BN nanomechanical resonators with engineerable coupling strength. Experimental measurements validate that these phononic crystal waveguides confine and support 15 to 24 megahertz (MHz) wave propagation over 1.2 millimeters. Analogous to solid-state atomic crystal lattices, phononic bandgaps and dispersive behaviors have been observed and systematically investigated in the h-BN phononic waveguides. Guiding and manipulating acoustic waves on such additively integratable h-BN platform may facilitate multiphysical coupling and information transduction, and open up new opportunities for coherent on-chip signal processing and communication via emerging h-BN photonic and phononic devices.
13 Pages, 6 Figures, 14 Pages of Supplementary Information
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- Breakdown of Conventional Winding Number Calculation in One-Dimensional Lattices with Interactions Beyond Nearest Neighbors
- Cavity Quantum Electrodynamics Design with Single Photon Emitters in Hexagonal Boron Nitride
- Mechanically-tunable bandgap closing in 2D graphene phononic crystals
- Fabry-Perot Interferometric Calibration of 2D Nanomechanical Plate Resonators
- Buckling-induced quadratic nonlinearity in silicon phonon waveguide structures
- Towards tunable graphene phononic crystals