A5064806572- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Advanced MEMS and NEMS Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Frequency and Time Standards
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Acoustic Wave Resonator Technologies
- Quantum optics and atomic interactions
- Force Microscopy Techniques and Applications
- Neural Networks and Reservoir Computing
- Cold Atom Physics and Bose-Einstein Condensates
- Magneto-Optical Properties and Applications
- Spectroscopy and Laser Applications
- Photonic Crystal and Fiber Optics
- Optical Coatings and Gratings
- Plasmonic and Surface Plasmon Research
- Photorefractive and Nonlinear Optics
- Quantum Information and Cryptography
- Quantum, superfluid, helium dynamics
- Geophysics and Sensor Technology
- Fern and Epiphyte Biology
Yale University
2016-2025
National Institute of Standards and Technology
2021
Massachusetts Institute of Technology
2003-2013
Sandia National Laboratories
2009-2013
The University of Texas at Austin
2013
Sandia National Laboratories California
2009-2012
Office of Scientific and Technical Information
2011
National Technical Information Service
2011
Abstract Nanoscale modal confinement is known to radically enhance the effect of intrinsic Kerr and Raman nonlinearities within nanophotonic silicon waveguides. By contrast, stimulated Brillouin-scattering nonlinearities, which involve coherent coupling between guided photon phonon modes, are stifled in conventional nanophotonics, preventing realization a host Brillouin-based signal-processing technologies silicon. Here we demonstrate Brillouin scattering waveguides, for first time, through...
The ability to engineer and manipulate different types of quantum mechanical objects allows us take advantage their unique properties create useful hybrid technologies. Thus far, complex states exquisite control have been demonstrated in systems ranging from trapped ions superconducting resonators. Recently, there many efforts extend these demonstrations the motion complex, macroscopic objects. These important applications as memories or transducers for measuring connecting systems. In...
Numerous modern technologies are reliant on the low-phase noise and exquisite timing stability of microwave signals. Substantial progress has been made in field photonics, whereby low-noise signals generated by down-conversion ultrastable optical references using a frequency comb
Enhanced coupling to vertical radiation is obtained from a light-emitting diode using two-dimensional photonic crystal that lies entirely inside the upper cladding layer of an asymmetric quantum well structure. A sixfold enhancement in light extraction direction without penetrating active material. The also used couple pump at normal incidence into structure, providing strong optical excitation.
Stimulated Brillouin scattering in bulk materials and micron-scaled optical fibers has been exploited to realize coherent phonon generation slow light as well new sources. What happens when the size of a light-interacting system is reduced nanoscales? A qualitatively new, several-orders-of-magnitude more powerful form stimulated shown emerge.
Third-order add-drop filters based on series-coupled microring resonators were fabricated in silicon-rich silicon nitride with accurate dimensional control and negligible sidewall roughness. For the first time, a low 3 dB drop loss is demonstrated wide 24 nm free-spectral-range high-order filter without using Vernier effect. The spectral response matched by rigorous numerical simulation, non-idealities drop- through-port responses are shown to be of design origin correctable.
We propose and demonstrate a multistage design for microphotonic add-drop filters that provides reduced drop-port loss relaxed tolerances achieving high in-band extinction. As result, the first microring-resonator with rectangular notch stopband in through port (to our knowledge) are shown, extinctions exceeding 50 dB. Reaching 30 dB beyond previous results, without postfabrication trimming, such extinction levels open door to circuits spectroscopy, wavelength conversion, quantum...
Rapid progress in integrated photonics has fostered numerous chip-scale sensing, computing and signal processing technologies. However, many crucial filtering delay operations are difficult to perform with all-optical devices. Unlike photons propagating at luminal speeds, GHz-acoustic phonons moving slower velocities allow information be stored, filtered delayed over comparatively smaller length-scales remarkable fidelity. Hence, controllable efficient coupling between coherent enables new...
Radiation pressure is known to scale large values in engineered micro and nanoscale photonic waveguide systems. In addition radiation pressure, dielectric materials also exhibit strain-dependent refractive index changes, through which optical fields can induce electrostrictive forces. To date, little attention has been paid the component of forces high-index contrast waveguides. this paper, we examine magnitude, scaling, spatial distribution analytical numerical models, revealing that...
<a href="http://www.osa-jon.org/virtual_issue.cfm?vid=28">Feature Issue on Nanoscale Integrated Photonics for Optical Networks</a> The goal of the research program that we describe is to break emerging performance wall in microprocessor development arising from limited bandwidth and density on-chip interconnects chip-to-chip (processor-to-memory) electrical interfaces. Complementary metal-oxide semiconductor compatible photonic devices provide an infrastructure deployment a range integrated...
Brillouin laser oscillators offer powerful and flexible dynamics as the basis for mode-locked lasers, microwave oscillators, optical gyroscopes in a variety of systems. However, interactions are exceedingly weak conventional silicon photonic waveguides, stifling progress towards silicon-based lasers. The recent advent hybrid photonic-phononic waveguides has revealed to be one strongest most tailorable nonlinearities silicon. Here, we harness these engineered demonstrate lasing Moreover, show...
Brillouin nonlinearities-which result from coupling between photons and acoustic phonons-are exceedingly weak in conventional nanophotonic silicon waveguides. Only recently have interactions been transformed into the strongest most tailorable nonlinear using a new class of optomechanical waveguides that control both light sound. In this paper, we use multi-mode waveguide to create stimulated scattering light-fields guided distinct spatial modes an integrated for first time. This interaction,...
We develop a general framework of evaluating the gain coefficient Stimulated Brillouin Scattering (SBS) in optical waveguides via overlap integral between and elastic eigen-modes. show that spatial symmetry force dictates selection rules excitable modes. By applying this method to rectangular silicon waveguide, we demonstrate distributions eigen-modes jointly determine magnitude scaling SBS both forward backward processes. further apply inter-modal process, coupling distinct modes are...
We demonstrate 0.034 dB/m loss waveguides in a 200-mm wafer-scale, silicon nitride (Si3N4) CMOS-foundry-compatible integration platform. fabricate resonators that measure up to 720 million intrinsic Q resonator at 1615 nm wavelength with 258 kHz linewidth. This is used realize Brillouin laser an energy-efficient 380 µW threshold power. The performance achieved by reducing scattering losses through combination of single-mode TM waveguide design and etched blanket-layer low-pressure chemical...
Lasers with hertz linewidths at time scales of seconds are critical for metrology, timekeeping, and manipulation quantum systems. Such frequency stability relies on bulk-optic lasers reference cavities, where increased size is leveraged to reduce noise but the trade-off cost, hand assembly, limited applications. Alternatively, planar waveguide-based enjoy complementary metal-oxide semiconductor scalability yet fundamentally from achieving by stochastic thermal sensitivity. In this work, we...