Dr. Ranojoy Bose Profile

Dr. Ranojoy Bose

Researcher at Hewlett Packard Enterprise

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Publications (8)

Proceedings Article | 14 March 2018 Presentation

How coherent Ising machines push circuit design in silicon photonics to its limits (Conference Presentation)

Thomas Van Vaerenbergh, Ranojoy Bose, David Kielpinski, Gabriel Mendoza, Jason Pelc, Nikolas Tezak, Charles Santori, Raymond Beausoleil

Proceedings Volume 10537, 105370D (2018) https://doi.org/10.1117/12.2288586

KEYWORDS: Silicon photonics, Amorphous silicon, Optical computing, Multiplexing, Gallium arsenide, Waveguides, Photonic crystals, Nonlinear optics, Photonic microstructures, Electronic design automation

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Proceedings Article | 24 August 2017 Presentation + Paper

Thermally tunable III-V photonic crystals for coherent nonlinear optical circuits

Ranojoy Bose, Marina Radulaski, Tho Tran, Thomas Van Vaerenbergh, Dave Kielpinski, Raymond Beausoleil

Proceedings Volume 10376, 103760B (2017) https://doi.org/10.1117/12.2274123

KEYWORDS: Photonic crystals, Waveguides, Gallium arsenide, Optical circuits, Optical components, Optical networks, Light wave propagation, Lithography, Glasses, Cladding

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Proceedings Article | 27 July 2016 Presentation

Design automation for integrated nonlinear logic circuits (Conference Presentation)

Thomas Van Vaerenbergh, Jason Pelc, Charles Santori, Ranojoy Bose, Dave Kielpinski, Raymond Beausoleil

Proceedings Volume 9891, 989118 (2016) https://doi.org/10.1117/12.2227830

KEYWORDS: Photonic integrated circuits, Logic, Integrated circuit design, Electronic design automation, Integrated circuits, Microrings, Information technology, Electronic circuits, Transistors, Data processing

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A key enabler of the IT revolution of the late 20th century was the development of electronic design automation (EDA) tools allowing engineers to manage the complexity of electronic circuits with transistor counts now reaching into the billions. Recently, we have been developing large-scale nonlinear photonic integrated logic circuits for next generation all-optical information processing. At this time a sufficiently powerful EDA-style software tool chain to design this type of complex circuits does not yet exist. Here we describe a hierarchical approach to automating the design and validation of photonic integrated circuits, which can scale to several orders of magnitude higher complexity than the state of the art. Most photonic integrated circuits developed today consist of a small number of components, and only limited hierarchy. For example, a simple photonic transceiver may contain on the order of 10 building-block components, consisting of grating couplers for photonic I/O, modulators, and signal splitters/combiners. Because this is relatively easy to lay out by hand (or simple script) existing photonic design tools have relatively little automation in comparison to electronics tools. But demonstrating all-optical logic will require significantly more complex photonic circuits containing up to 1,000 components, hence becoming infeasible to design manually. Our design framework is based off Python-based software from Luceda Photonics which provides an environment to describe components, simulate their behavior, and export design files (GDS) to foundries for fabrication. At a fundamental level, a photonic component is described as a parametric cell (PCell) similarly to electronics design. PCells are described by geometric characteristics of their layout. A critical part of the design framework is the implementation of PCells as Python objects. PCell objects can then use inheritance to simplify design, and hierarchical designs can be made by creating composite PCells (modules) which consist of primitive building-block PCells (components). To automatically produce layouts, we built on a construct provided by Luceda called a PlaceAndAutoRoute cell: we create a module component by supplying a list of child cells, and a list of the desired connections between the cells (e.g. the out0 port of a microring is connected to a grating coupler). This functionality allowed us to write algorithms to automatically lay out the components: for instance, by laying out the first component and walking through the list of connections to check to see if the next component is already placed or not. The placement and orientation of the new component is determined by minimizing the length of a connecting waveguide. Our photonic circuits also utilize electrical signals to tune the photonic elements (setting propagation phases or microring resonant frequencies via thermo-optical tuning): the algorithm also routes the contacts for the metal heaters to contact pads at the edge of the circuit being designed where it can be contacted by electrical probes. We are currently validating a test run fabricated over the summer, and will use detailed characterization results to prepare our final design cycle in which we aim to demonstrate complex operational logic circuits containing ~50-100 nonlinear resonators.

Proceedings Article | 4 March 2015 Paper

Coherent control of energy transfer in a quantum dot strongly coupled to a photonic crystal molecule

Tao Cai, Ranojoy Bose, Kaushik Choudhury, Glenn Solomon, Edo Waks

Proceedings Volume 9377, 93770A (2015) https://doi.org/10.1117/12.2078199

KEYWORDS: Quantum dots, Photonic crystals, Molecular photonics, Picosecond phenomena, Molecules, Polaritons, Energy transfer, Chemical species, Molecular energy transfer, Control systems

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Proceedings Article | 12 September 2014 Paper

Controlling a photon with a solid-state quantum bit

Edo Waks, Hyochul Kim, Ranojoy Bose, Tao Cai, Shuo Sun, Glenn Solomon

Proceedings Volume 9162, 91620A (2014) https://doi.org/10.1117/12.2061333

KEYWORDS: Quantum communications, Quantum information, Solid state physics, Quantum computing, Quantum networks, Picosecond phenomena, Photonic crystals, Photon polarization, Polarization, Magnetism

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Proceedings Article | 12 September 2011 Paper

Nonlinear optics near the single photon level with quantum dots coupled to photonic crystals

Edo Waks, Deepak Sridharan, Ranojoy Bose, Hyochul Kim, Thomas Shen, Glenn Solomon

Proceedings Volume 8095, 809516 (2011) https://doi.org/10.1117/12.891780

KEYWORDS: Photonic crystals, Waveguides, Nonlinear optics, Quantum dots, Single photon, Integrated optics, Luminescence, Light scattering, Quantum computing, Scattering

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Proceedings Article | 11 November 2005 Paper

Interaction of infiltrated colloidal PbS nanocrystals with high Q/V silicon photonic bandgap nanocavities for near-infrared enhanced spontaneous emissions

Ranojoy Bose, Dmitri Talapin, Xiaodong Yang, Richard Harniman, Phung Nguyen, Chee Wei Wong

Proceedings Volume 6005, 600509 (2005) https://doi.org/10.1117/12.632900

KEYWORDS: Nanocrystals, Photonic crystals, Lead, Silicon, Excitons, Silicon photonics, Single photon, Quantum information, Crystals, Semiconductor lasers

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Proceedings Article | 25 April 2002 Paper

Anisotropic photonic-bandgap structures

Victor Kopp, Peter Shibaev, Ranojoy Bose, Azriel Genack

Proceedings Volume 4655, (2002) https://doi.org/10.1117/12.463868

KEYWORDS: Transparency, Polarization, Transmittance, Microwave radiation, Wave propagation, Absorption, Photonic crystals, Refraction, Refractive index, Liquid crystals

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Showing 5 of 8 publications

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