Control of coherent information via on-chip photonic-phononic emitter-receivers.
Rapid progress in integrated photonics has fostered numerous chip-scale sensing, computing and signal processing technologies. However, many crucial filtering and signal delay operations are difficult to perform with all-optical devices. Unlike photons propagating at luminal speeds, GHz-acoustic phonons moving at slower velocities allow information to be stored, filtered and delayed over comparatively smaller length-scales with remarkable fidelity. Hence, controllable and efficient coupling between coherent photons and phonons enables new signal processing technologies that greatly enhance the performance and potential impact of integrated photonics. Here we demonstrate a mechanism for coherent information processing based on travelling-wave photon-phonon transduction, which achieves a phonon emit-and-receive process between distinct nanophotonic waveguides. Using this device, physics--which supports GHz frequencies--we create wavelength-insensitive radiofrequency photonic filters with frequency selectivity, narrow-linewidth and high power-handling in silicon. More generally, this emit-receive concept is the impetus for enabling new signal processing schemes.
Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
Heedeuk
H
Shin
Sandia National Laboratories, PO Box 5800, Albuquerque, New Mexico 87185, USA.
Jonathan A
JA
Cox
Sandia National Laboratories, PO Box 5800, Albuquerque, New Mexico 87185, USA.
Robert
R
Jarecki
Sandia National Laboratories, PO Box 5800, Albuquerque, New Mexico 87185, USA.
Andrew
A
Starbuck
Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78758, USA.
Zheng
Z
Wang
Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
Peter T
PT
Rakich