Strong Optomechanical Confinement for Novel Forward Brillouin Interactions
Abstract
AbstractThe objective of the proposed research is to design and characterize optomechanical waveguides for a new class of acousto-optical interactions between fundamental acoustic modes and distinct spatial optical modes. Traditional optomechanical interactions,known as Brillouin scattering, have enabled powerful new approaches to rf-processing including filtering and delay lines. However,established Brillouin interactions are inherently limited by fundamental material properties, limiting the performance and providing an undesirable lack of parameter flexibility for applications. By coupling between the first two optical modes in a few-mode waveguide (Forward InterModal-FIM) and the Fundamental Acoustic Mode (FAM) in an overlapping acoustic mode, FIM-FAM interactions offer critical new degrees of freedom for widely tunable interactions. To achieve this new functionality strong optical and acoustic confinement is required. The technical approach for the proposed research program has three thrusts. In the first thrust, FIM-FAM activefiber devices with performance suitable for applications will be designed and characterized, including long and homogeneous tapers,tapers with a linear transition region, and long reduced cladding fibers. Through the second thrust, promising fiber FIM-FAM devices will be implemented in the development of radiofrequency bandpass filters. We will investigate three schemata for implementing filters with previously unavailable frequency selectivity. In the final thrust we will initiate development of suspended structures for identifying and evaluating the geometry and relevant optical and acoustic modes for potential application of FIM-FAM to an integrated device.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 24, 2023
- Source ID
- N000142312704
Entities
People
- William Renninger
Organizations
- Office of Naval Research
- United States Navy
- University of Rochester