2014/09/30 by Heedeuk Shin, Jonathan A. Cox, Robert Jarecki +3 · 4 citations
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Chip #Computer science #Electronic engineering #Engineering #Mechanical and Optical Resonators #Nanophotonics #Optics #Optoelectronics #Phonon #Photon #Photonic and Optical Devices #Photonics #Physics #Radar #SIGNAL (programming language) #Signal processing #Silicon photonics #Telecommunications #physics.optics
paper · pdf · doi:10.1038/ncomms7427
published as Nature Communications 6, 6427 (2015) · Main text (7 pages and 4 figures). Supplementary information (6 pages and 2 figures)
arxiv created 2015/01/13 · openalex publication_date 2015/03/05 · arxiv updated 2015/04/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.