Mr. Anthony J. Rizzo Profile

Anthony J. Rizzo

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Publications (5)

Proceedings Article | 15 March 2023 Presentation + Paper

Scalable architecture for sub-pJ/b multi-Tbps comb-driven DWDM silicon photonic transceiver

Yuyang Wang, Asher Novick, Robert Parsons, Songli Wang, Kaylx Jang, Aneek James, Maarten Hattink, Vignesh Gopal, Anthony Rizzo, Chia-Pin Chiu, Kaveh Hosseini, Tim Tri Hoang, Keren Bergman

Proceedings Volume 12429, 124291F (2023) https://doi.org/10.1117/12.2649506

KEYWORDS: Design and modelling, Microresonators, Resonators, Transceivers, Tunable filters, Dense wavelength division multiplexing, Photonic integrated circuits, Fabrication, Aliasing, Silicon, Silicon photonics, Optical interconnects, Very large scale integration, Energy efficiency, Frequency combs

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Proceedings Article | 4 March 2022 Presentation + Paper

Mitigation of parasitic junction formation in compact resonant modulators with doped silicon heaters

Vaishnavi Murthy, Anthony Rizzo, Gerald Leake, Nandish Mehta, Asher Novick, Stuart Daudlin, Maarten Hattink, Matthew van Niekerk, Michael Fanto, Daniel Coleman, Stefan Preble, Keren Bergman

Proceedings Volume 11987, 119870G (2022) https://doi.org/10.1117/12.2607287

KEYWORDS: Oxides, Silicon, Modulators, Modulation, Silicon photonics, Thermal optics, Device simulation, Dense wavelength division multiplexing, Diodes, Resonators

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Proceedings Article | 4 March 2019 Presentation + Paper

Ultra-low power consumption silicon photonic link design analysis in the AIM PDK

Anthony Rizzo, Liang Yuan Dai, Xiang Meng, Yanir London, Jigesh Patel, Madeleine Glick, Keren Bergman

Proceedings Volume 10924, 1092407 (2019) https://doi.org/10.1117/12.2508514

KEYWORDS: Modulation, Silicon photonics, Channel projecting optics, Photonic integrated circuits, Receivers, Modulators, Waveguides, Analytical research, Transmitters, Data modeling

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Proceedings Article | 4 March 2019 Paper

Integrated photonics for NASA applications

Michael Krainak, Mark Stephen, Elisavet Troupaki, Sarah Tedder, Baraquiel Reyna, Jonathan Klamkin, Hongwei Zhao, Bowen Song, Joseph Fridlander, Minh Tran, John Bowers, Keren Bergman, Michal Lipson, Anthony Rizzo, Ipshita Datta, Nathan Abrams, Shayan Mookherjea, Seng-Tiong Ho, Qiang Bei, Yingyan Huang, Yongming Tu, Behzad Moslehi, James Harris, Andrey Matsko, Anatoliy Savchenkov, Guangyao Liu, Roberto Proietti, S. J. Yoo, Leif Johansson, Christophe Dorrer, Francisco Arteaga-Sierra, Jie Qiao, Songbin Gong, Tingyi Gu, Osgar John Ohanian, Xingjie Ni, Yimin Ding, Yao Duan, Hamed Dalir, Ray Chen, Volker Sorger, Tin Komljenovic

Proceedings Volume 10899, 108990F (2019) https://doi.org/10.1117/12.2509808

KEYWORDS: Waveguides, Modulation, Silicon, Modulators, Photonic integrated circuits, Graphene, Oscillators, Integrated photonics, Integrated optics, Silicon photonics

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NASA is working with US industry and academia to develop Photonic Integrated Circuits (PICs) for: (1) Sensors (2) Analog RF applications (3) Computing and free space communications. The PICs provide reduced size, weight, and power that is critical for space-based systems. We describe recent breakthrough 3D monolithic integration of photonic structures, particularly high-speed graphene-silicon devices on CMOS electronics to create CMOS-compatible highbandwidth transceivers for ultra-low power Terabit-scale optical communications. An integrated graphene electro-optic modulator has been demonstrated with a bandwidth of 30 GHz. Graphene microring modulators are especially attractive for dense wavelength division multiplexed (DWDM) systems. For space-based optical communication and ranging we have demonstrated generating a variable number of channels from a single laser using breadboard components, using a single-sideband carrier-suppressed (SSBCS) modulator driven by an externally-supplied RF tone (arbitrary RF frequency), a tunable optical bandpass filter, and an optical amplifier which are placed in a loop. We developed a Return--to-Zero (RZ) Differential Phase Shift Keying (DPSK) laser transmitter PIC using an InP technology platform that includes a tunable laser, a Semiconductor Optical Amplifier (SOA), high-speed Mach-Zehnder Modulator (MZM), and an electroabsorption (EAM) modulator. A Silicon Nitride (SiN) platform integrated photonic circuit suitable for a spectrally pure chip-scale tunable opto-electronic RF oscillator (OEO) that can operate as a flywheel in high precision optical clock modules, as well as radio astronomy, spectroscopy, and local oscillator in radar and communications systems is needed. We have demonstrated a low noise optical frequency combs generation from a small OEO prototypes containing very low loss (~1 dB) waveguide couplers of various shapes and sizes integrated with an ultrahigh-Q MgF2 resonators. An innovative miniaturized lab-on-a-chip device is being developed to directly monitor astronaut health during missions using ~3 drops of body fluid sample like blood, urine, and potentially other body fluids like saliva, sweat or tears. The first-generation system comprises a miniaturized biosensor based on PICs (including Vertical Cavity Surface Emitting Laser – VCSEL, photodetector and optical filters and biochemical assay that generates a fluorescent optical signal change in response to the target analyte.

Proceedings Article | 5 October 2017 Paper

Integrated photon sources for quantum information science applications

M. Fanto, C. Tison, J. Steidle, T. Lu, Z. Wang, N. Mogent, A. Rizzo, P. Thomas, S. Preble, P. Alsing, D. Englund

Proceedings Volume 10442, 104420K (2017) https://doi.org/10.1117/12.2282154

KEYWORDS: Resonators, Waveguides, Aluminum nitride, Microrings, Silicon, Integrated photonics, Quantum information, Ultraviolet radiation, Mach-Zehnder interferometers, Avalanche photodetectors

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Ring resonators are used as photon pair sources by taking advantage of the materials second or third order non- linearities through the processes of spontaneous parametric downconversion and spontaneous four wave mixing respectively. Two materials of interest for these applications are silicon for the infrared and aluminum nitride for the ultraviolet through the infrared. When fabricated into ring type sources they are capable of producing pairs of indistinguishable photons but typically suffer from an effective 50% loss. By slightly decoupling the input waveguide from the ring, the drop port coincidence ratio can be significantly increased with the trade-off being that the pump is less efficiently coupled into the ring. Ring resonators with this design have been demonstrated having coincidence ratios of 96% but requiring a factor of ~10 increase in the pump power. Through the modification of the coupling design that relies on additional spectral dependence, it is possible to achieve similar coincidence ratios without the increased pumping requirement. This can be achieved by coupling the input waveguide to the ring multiple times, thus creating a Mach-Zehnder interferometer. This coupler design can be used on both sides of the ring resonator so that resonances supported by one of the couplers are suppressed by the other. This is the ideal configuration for a photon-pair source as it can only support the pump photons at the input side while only allowing the generated photons to leave through the output side. Recently, this device has been realized with preliminary results exhibiting the desired spectral dependence and with a coincidence ratio as high as ~ 97% while allowing the pump to be nearly critically coupled to the ring. The demonstrated near unity coincidence ratio infers a near maximal heralding efficiency from the fabricated device. This device has the potential to greatly improve the scalability and performance of quantum computing and communication systems.

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