2017 Session M6: Nonlinear & Quantum, Chair: Pablo Sanchis

Microwave and RF Photonic Applications of Micro-Combs

Xingyuan Xu, Jiayang Wu, Mehrdad Shoeiby, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, and David J. Moss1
Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn, VIC 3122 Australia
School of Engineering, RMIT University, Melbourne, VIC 3000, Australia Department of Physics and Material Science, City University of Hong Kong, Hong Kong, China.
Xi’an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi’an, China. 5INRS – É nergie, Matériaux et Télécommunications, Varennes, Québec, J3X 1S2, Canada.

Photonic integrated circuits that exploit nonlinear optics for all-optical signal processing have been demonstrated, particularly in silicon, including all-optical logic, demultiplexing from 160Gb/s to over 1Tb/s, to optical performance monitoring using slow light at speeds of up to 640Gb/s, all-optical regeneration, and many others. The efficiency of alloptical devices depends on the waveguide nonlinear parameter, γ =  n2 / c Aeff. Although silicon can achieve extremely high values of γ, it suffers from high nonlinear losses due to two-photon absorption (TPA) and the resulting free carriers. Even if the free carriers are eliminated by p-in junctions, silicon’s poor intrinsic nonlinear figure of merit (FOM = n2 / (β λ), where β is the TPA) of around 0.3 in the telecom band is far too low to achieve high performance. While TPA can be turned to advantage for all-optical functions, for the most part silicon’s low FOM in the telecom band is a limitation.


Efficient  nonlinear  interactions  in  GaN  waveguides

Maksym  GROMOVYI,  Fabrice  SEMOND,  Julien  BRAULT,  Aimeric  COURVILLE,   Pascal  BALDI,  Jean-­‐Yves  DUBOZ,  Marc  P.  DE  MICHELI
Université  Côte  d’Azur,  CNRS,  CRHEA,  rue  Bernard  Grégory,  06560 Valbonne,  France
Université  Côte  d’Azur,  CNRS,  INΦNI,  Parc  Valrose,  06100  Nice,  France  Maksym.Gromovyi@crhea.cnrs.fr

Abstract:  We  have  been  able  to  fabricate  low  loss  GaN  planar waveguides designed  for   efficient  second  harmonic  generation.  By  using  modal  phase matching  we  reached  2%   power  conversion  between  the  TM0  pump  and the  TM2  harmonic  modes.


Hybrid Integrated Photonics for On-Chip Heralded Photon-Number States

Panagiotis VERGYRIS, Thomas MEANY, Tommaso LUNGHI, Gregory SAUDER, James DOWNES, M. J. Steel, Michael J. Withford, Olivier ALIBART, Sébastien TANZILLI
Université Côte d’Azur, CNRS, Laboratoire de Physique de la Matière Condensée (LPMC), Nice, 06108 Nice cedex 2, France
Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Department of Physics and Astronomy, Macquarie University, North Ryde, 2109 NSW, Australia

Abstract: We show the potential of a hybrid technology for realizing highly complex circuits for quantum photonic applications. We demonstrate the most advanced chip enabling four photon generation and manipulation for heralding tunable two-photon states.


Integrated Quantum Optics with Electrically Driven Quantum Dot – Micropillars

Institut für Festkörperphysik, Technische Universität Berlin
Berlin 10623, Germany
Technische Physik, Universität Würzburg, Würzburg 97074, Germany
School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom

Abstract: We report on results in the field of integrated quantum optics using a novel integrated photonic device consisting of electrically contacted InGaAs quantum dot-micropillar cavities. Whispering gallery modes support single-mode lasing and radiate within the plane of the active material towards neighbouring, separately contacted micropillars, which are monolithically integrated and can be used for a range of purposes including on-demand single photon generation and investigating opto-electronic feedback.


Sub-Wavelength engineered waveguide Bragg filter for optical pump-rejection

Diego PEREZ-GALACHO, Carlos ALONSO-RAMOS, Florent MAZEAS, Xavier Le ROUX, Dorian OSER, Weiwei ZHANG, Delphine MARRIS-MORINI, Laurent LABONTE, Sébastien TANZILLI, Eric CASSAN, Laurent VIVIEN
Centre for Nanoscience and Nanotechnology, CNRS, Univ. Paris-Sud, 91405 Orsay, France
Université Nice Sophia Antipolis, Laboratoire de Physique de la Matière Condensée, CNRS UMR 7336, Parc Valrose, 06108 Nice cedex 2, France diego.perez-galacho@u-psud.fr

Silicon photonics has become a major technology in the recent years. Its development has been driven mainly by datacom and sensing applications. However it can also be used for generating and manipulating entangled photon pairs. This paves the way to the envisioned monolithic integration of quantum-processing circuits. On-chip photon pairs generation has been already demonstrated using spontaneous four wave mixing in Si microresonators. Due to huge difference in terms of power between the pump signal and the photon pair signal, on-chip pump-rejection filters are required in order to use this kind of nonlinear sources. The requirements for these filters comprise not only high rejection but also narrow bandwidth (typically around 1nm). Implementing on-chip filters with those characteristics is nowadays a real challenge.