Date:
Mon, 30/12/202412:00-13:30
Location:
Place: Levin building, Lecture Hall No. 8
Lecturer: Avi Zadok, Bar Ilan
Abstract:
The interactions between optical and mechanical waves are often studied in specialty platforms, which enable extensive optimization and support stronger effects. In this seminar, I address the prospects of opto-mechanics in two of the most common, "boring" photonics platforms: the standard fibers and silicon-on-insulator waveguide circuits. While these platforms are not built for opto-mechanics, and leave only limited room for design optimization, they nevertheless support a broad range of interactions between light and ultrasound. Opto-mechanical effects in standard fibers enable the sensing of media outside the boundaries of the cladding, where guided light does not reach. Other effects include non-reciprocal switching of light between the principal axes of polarization maintaining fibers, and a new class of fiber laser. Recent results in few-mode optical fibers will be presented as well. Acoustic waves may be launched along silicon-photonic integrated circuits through thermo-elastic excitation in metallic grating elements. The acoustic waves implement long delay lines, narrowband microwave-photonic filters, thin layers analysis, and microwave-frequency oscillators.
Abstract:
The interactions between optical and mechanical waves are often studied in specialty platforms, which enable extensive optimization and support stronger effects. In this seminar, I address the prospects of opto-mechanics in two of the most common, "boring" photonics platforms: the standard fibers and silicon-on-insulator waveguide circuits. While these platforms are not built for opto-mechanics, and leave only limited room for design optimization, they nevertheless support a broad range of interactions between light and ultrasound. Opto-mechanical effects in standard fibers enable the sensing of media outside the boundaries of the cladding, where guided light does not reach. Other effects include non-reciprocal switching of light between the principal axes of polarization maintaining fibers, and a new class of fiber laser. Recent results in few-mode optical fibers will be presented as well. Acoustic waves may be launched along silicon-photonic integrated circuits through thermo-elastic excitation in metallic grating elements. The acoustic waves implement long delay lines, narrowband microwave-photonic filters, thin layers analysis, and microwave-frequency oscillators.