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Supercontinuum generation in silicon photonics platforms

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Photonics Research 2022年第3期10卷 I0009-I0022页

作者： Christian Lafforgue Miguel Montesinos-Ballester Thi-Thuy-Duong Dinh Xavier Le Roux Eric Cassan delphine Marris-Morini Carlos Alonso-Ramos Laurent Vivien centre de nanosciences et de nanotechnologies(C2N) CNRSUniversitéParis-Saclay91120 PalaiseauFrance

Nonlinear optics has not stopped evolving,offering opportunities to develop novel functionalities in *** generation,a nonlinear optical phenomenon responsible for extreme spectral broadening,attracts the interest of researchers due to its high potential in many applications,including sensing,imaging,or optical *** particular,with the emergence of silicon photonics,integrated supercontinuum sources in silicon platforms have seen tremendous progress during the past *** article aims at giving an overview of supercontinuum generation in three main silicon-compatible photonics platforms,namely,silicon,silicon germanium,and silicon nitride,as well as the essential theoretical elements to understand this fascinating phenomenon.

关键词： offering photonics Super

Extreme multiexciton emission from deterministically assembled single-emitter subwavelength plasmonic patch antennas

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Light(Science & Applications) 2020年第1期9卷 1697-1705页

作者： Amit Raj Dhawan Cherif Belacel Juan Uriel Esparza-Villa Michel Nasilowski Zhiming Wang Catherine Schwob Jean-Paul Hugonin Laurent Coolen Benoit Dubertret Pascale Senellart Agnes Maitre Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China Sorbonne Universite CNRSInstitut des Nanosciences de ParisUMR 758875005 ParisFrance centre de nanosciences et de nanotechnologies et de nanostructures CNRS UMR9001Universite Paris-Saclay10 boulevard Thomas Gobert91120 MarcoussisFrance Laboratoire de Physique et d’etude des Materiaux ESPCI-ParisTechPSL Research UniversitySorbonne UniversiteCNRS UMR 821310 rue VauquelinParis 75005France Laboratoire Charles Fabry Institut d’Optique Graduate SchoolCNRS UMR 8501Universite Paris Saclay2 avenue Augustin Fresnel91127 Palaiseau CedexFrance

Coupling nano-emitters to plasmonic antennas is a key milestone for the development of nanoscale quantum light *** challenge,however,is the precise nanoscale positioning of the emitter in the ***,we present a laser etching protocol that deterministically positions a single colloidal CdSe/CdS core/shell quantum dot emitter inside a subwavelength plasmonic patch antenna with three-dimensional nanoscale *** exploiting the properties of metal–insulator–metal structures at the nanoscale,the fabricated single-emitter antenna exhibits a very high-Purcell factor(>72)and a brightness enhancement of a factor of *** to the unprecedented quenching of Auger processes and the strong acceleration of the multiexciton emission,more than 4 photons per pulse can be emitted by a single quantum dot,thus increasing the device *** technology can be applied to a wide range of photonic nanostructures and emitters,paving the way for scalable and reliable fabrication of ultracompact light sources.

关键词： patch precise acceleration

Mode selection and dispersion engineering in Bragg-like slot photonic crystal waveguides for hybrid light-matter interactions

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Photonics Research 2018年第1期9卷 54-60页

作者： samuel serna weiwei zhang thi hong cam hoang carlos alonso-ramos delphine marris-morini laurent vivien eric cassan centre de nanosciences et de nanotechnologies UMR 9001 (CNRS/Universite Paris-Sud) Universite Paris-Saclay 91405 Orsay France

We introduce a family of slot photonic crystal waveguides(SPh CWs) for the hybrid integration of low-index active materials in silicon photonics with energy-confinement factors of ~30% in low-index regions. The proposed approach, which is based on a periodic indentation of the etched slot in the middle of the SPh CW, makes it possible to reconcile a simultaneously narrow and wide slot for exploiting the two modes of even symmetry of a SPh CW. The resulting mode-selection mechanism allows a flexible choice of the modes to be used. Furthermore,the proposed structure offers tremendous flexibility for adjusting the dispersive properties of the slot-confined modes, in particular of their slow-light effects. Flat band slow light in a bandwidth of about 60 nm with a group velocity dispersion factor jβ_2 j below 1 ps^2∕mm is numerically demonstrated by this approach, corresponding to a normalized delay bandwidth product of around 0.4. These results, obtained from hollow-core periodic waveguides that are directly designed in view of hybrid integration of active materials in mechanically robust structures(not based on free-standing membranes) could pave the way for the realization of on-chip slow-light bio-sensing,active hybrid-silicon optoelectronic devices, or all-optical hybrid-silicon nonlinear functionalities.

关键词：光子晶体波导通讯技术发展现状

Ultra-compact on-chip metaline-based 1.3/1.6 μm wavelength demultiplexer

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Photonics Research 2019年第3期7卷 359-362页

作者： YULONG FAN XAVIER LE ROUX ANATOLE LUPU ANDRé de LUSTRAC centre de nanosciences et de nanotechnologies CNRS Université Paris-Sud Université Paris-Saclay Université Paris Lumières Univ Paris Nanterre

In this paper, we report an experimental demonstration of enabling technology exploiting resonant properties of plasmonic nanoparticles, for the realization of wavelength-sensitive ultra-minituarized(4 μm× 4 μm) optical metadevices. To this end, the example of a 1.3/1.6 μm wavelength demultiplexer is considered. Its technological implementation is based on the integration of gold cut-wire-based metalines on the top of a silicon-on-insulator waveguide. The plasmonic metalines modify locally the effective index of the Si waveguide and thus allow for the implementation of wavelength-dependent optical pathways. The 1.3/1.6 μm wavelength separation with extinction ratio between two demultiplexers' channels reaching up to 20 dB is experimentally demonstrated. The considered approach, which can be readily adapted to different types of material planar lightwave circuit platforms and nanoresonators, is suited for the implementation of a generic family of wavelength-sensitive guided-wave optical metadevices.

关键词： experimental optical lightwave is Its can dB be

Ultrafast response of harmonic modelocked THz lasers

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Light(Science & Applications) 2020年第1期9卷 1530-1537页

作者： Feihu Wang Valentino Pistore Michael Riesch Hanond Nong Pierre-Baptiste Vigneron Raffaele Colombelli Olivier Parillaud Juliette Mangeney Jerome Tignon Christian Jirauschek Sukhdeep S.Dhillon Laboratoire de Physique de l’Ecole Normale Superieure ENSUniversite PSLCNRSSorbonne UniversiteUniversite de ParisParisFrance department of Electrical and Computer Engineering Technical University of MunichArcisstr.2180333 MunichGermany centre de nanosciences et de nanotechnologies CNRSUniv.Paris-SudUniversite Paris-SaclayC2N-Orsay91405 OrsayCedexFrance Ⅲ-ⅤLab 1 avenue Augustin Fresnel91767 PalaiseauFrance

The use of fundamental modelocking to generate short terahertz(THz)pulses and THz frequency combs from semiconductor lasers has become a routine affair,using quantum cascade lasers(QCLs)as a gain ***,unlike classic laser diodes,no demonstrations of harmonic modelocking,active or passive,have been shown in THz QCLs,where multiple pulses per round trip are generated when the laser is modulated at the harmonics of the cavity’s fundamental round-trip ***,using time-resolved THz techniques,we show for the first time harmonic injection and mode-locking in which THz QCLs are modulated at the harmonics of the round-trip *** demonstrate the generation of the harmonic electrical beatnote within a QCL,its injection locking to an active modulation and its direct translation to harmonic pulse generation using the unique ultrafast nature of our ***,we show indications of self-starting harmonic emission,i.e.,without external modulation,where the QCL operates exclusively on a harmonic(up to its 15th harmonic)of the round-trip *** behaviour is supported by time-resolved simulations of induced gain and loss in the system and shows the importance of the electronic,as well as photonic,nature of *** results open up the prospect of passive harmonic modelocking and THz pulse generation,as well as the generation of low-noise microwave generation in the hundreds of GHz region.

关键词： passive harmonic harmonics

Hybrid integration of 2D materials for on-chip nonlinear photonics

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Light(Advanced Manufacturing) 2023年第3期4卷 311-333页

作者： Vincent Pelgrin Hoon Hahn Yoon Eric Cassan Zhipei Sun QTF centre of Excellence Department of Electronics and NanoengineeringAalto UniversityP.O.Box 13500FI-00076 AaltoFinland UniversitéParis-Saclay CNRSCentre de Nanosciences et de Nanotechnologies91120PalaiseauFrance

Interests surrounding the development of on-chip nonlinear optical devices have been consistently growing in the past decades due to the tremendous applications,such as quantum photonics,all-optical communications,optical computing,on-chip metrology,and *** efficient on-chip nonlinear optical devices to meet the requirements of those applications brings the need for new directions to improve the existing photonic *** research has directed the field of on-chip nonlinear optics toward the hybrid integration of two-dimensional layered materials(such as graphene,transition metal dichalcogenides,and black phosphorous)with various integrated *** combination of well-known photonic chip design platforms(e.g.,silicon,silicon nitride)and different two-dimensional layered materials has opened the road for more versatile and efficient structures and devices,which has the great potential to unlock numerous new *** review discusses the modeling and characterization of different hybrid photonic integration structures with two-dimensional materials,highlights the current state of the art examples,and presents an outlook for future prospects.

关键词： Integrated photonics 2D materials Nanophotonic Nonlinear optics Quantum computation All-optical computing Spectroscopy Broadband light sources

Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices

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Light(Science & Applications) 2020年第1期9卷 627-636页

作者： Omar Jamadi Elena Rozas Grazia Salerno Marijana Milicevic Tomoki Ozawa Isabelle Sagnes Aristide Lemaitre Luc Le Gratiet Abdelmounaim Harouri Iacopo Carusotto Jacqueline Bloch Alberto Amo Universite de Lille CNRSUMR 8523—PhLAM—Physique des Lasers Atomes et Molecules59000 LilleFrance depto.de Fisica de Materiales e Instituto Nicolas Cabrera Universidad Autonoma de Madrid(UAM)28049 MadridSpain Center for Nonlinear Phenomena and Complex Systems Universite Libre de BruxellesCP 231Campus PlaineB-1050 BrusselsBelgium Universite Paris-Saclay CNRSCentre de Nanosciences et de Nanotechnologies91120 PalaiseauFrance Interdisciplinary Theoretical and Mathematical Sciences Program(iTHEMS) RIKENWakoSaitama 351-0198Japan INO-CNR BEC Center and Dipartimento di Fisica Universita di Trento38123 PovoItaly

We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars.A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice,giving rise to the formation of Landau levels at the Dirac *** provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction,a distinctive feature of synthetic magnetic *** realization implements helical edge states in the gap between n=0 and n=±1 Landau levels,experimentally demonstrating a novel way of engineering propagating edge states in photonic *** light of recent advances in the enhancement of polariton–polariton nonlinearities,the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system.

关键词： Landau helical realization

25 Gbps low-voltage hetero-structured silicongermanium waveguide pin photodetectors for monolithic on-chip nanophotonic architectures

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Photonics Research 2019年第4期7卷 437-444页

作者： DANIEL BENEDIKOVIC LéOPOLD VIROT GUY AUBIN FARAH AMAR BERTRAND SZELAG BAYRAM KARAKUS JEAN-MICHEL HARTMANN CARLOS ALONSO-RAMOS XAVIER LE ROUX PAUL CROZAT ERIC CASSAN deLPHINE MARRIS-MORINI CHARLES BAUDOT FRéDéRIC BOEUF JEAN-MARC FéDéLI CHRISTOPHE KOPP LAURENT VIVIEN centre de nanosciences et de nanotechnologies CNRS University of Paris-Sud Université Paris-Saclay University Grenoble Alpes and CEA LETI Minatec Campus Technology R&D STMicroelectronics SAS

Near-infrared germanium(Ge) photodetectors monolithically integrated on top of silicon-on-insulator substrates are universally regarded as key enablers towards chip-scale nanophotonics, with applications ranging from sensing and health monitoring to object recognition and optical communications. In this work, we report on the highdata-rate performance pin waveguide photodetectors made of a lateral hetero-structured silicon-Ge-silicon(Si-Ge-Si) junction operating under low reverse bias at 1.55 μm. The pin photodetector integration scheme considerably eases device manufacturing and is fully compatible with complementary metal-oxide-semiconductor technology. In particular, the hetero-structured Si-Ge-Si photodetectors show efficiency-bandwidth products of^9 GHz at-1 V and ~30 GHz at-3 V, with a leakage dark current as low as ~150 nA, allowing superior signal detection of high-speed data traffic. A bit-error rate of 10-9 is achieved for conventional 10 Gbps, 20 Gbps, and25 Gbps data rates, yielding optical power sensitivities of-13.85 dBm,-12.70 dBm, and-11.25 dBm, respectively. This demonstration opens up new horizons towards cost-effective Ge pin waveguide photodetectors that combine fast device operation at low voltages with standard semiconductor fabrication processes, as desired for reliable on-chip architectures in next-generation nanophotonics integrated circuits.

关键词： germanium(Ge) photodetectors chip-scale nanophotonics waveguide photodetectors

Stretching the spectra of Kerr frequency combs with self-adaptive boundary silicon waveguides

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Advanced Photonics 2020年第4期2卷 29-38页

作者： Jianhao Zhang Vincent Pelgrin Carlos Alonso-Ramos Laurent Vivien Sailing He Eric Cassan UniversitéParis-Saclay CNRSCentre de Nanosciences et de NanotechnologiesPalaiseauFrance Zhejiang University Centre for Optical and Electromagnetic ResearchState Key Laboratory for Modern Optical InstrumentationHangzhouChina

Dispersion engineering of optical waveguides is among the most important steps in enabling the realization of Kerr optical frequency combs.A recurring problem is the limited bandwidth in which the nonlinear phase matching condition is satisfied,due to the dispersion of the *** limitation is particularly stringent in high-index-contrast technologies such as *** propose a general approach to stretch the bandwidth of Kerr frequency combs based on subwavelength engineering of single-mode waveguides with self-adaptive *** wideband flattened dispersion operation comes from the particular property of the waveguide optical mode that automatically self-adapts its spatial profile at different wavelengths to slightly different effective spatial spans determined by its effective index *** flattened dispersion relies on the squeezing of small normal-dispersion regions between two anomalous spectral zones,which enables it to achieve two Cherenkov radiation points and substantially broaden the comb,achieving a bandwidth between 2.2 and 3.4μm *** strategy opens up a design space for trimming the spectra of Kerr frequency combs using high-index-contrast platforms and can provide benefits to various nonlinear applications in which the manipulation of energy spacing and phase matching are pivotal.

关键词： nonlinear optics effective boundary subwavelength grating silicon frequency comb