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3D integrated photonics platform with deterministic geometry control

Photonics Research 2020年第2期8卷 194-201页

作者： JEROME MICHON SARAH GEIGER LAN LI CLAUDIA GONCALVES HONGTAO LIN kathleen richardson XINQIAO JIA JUEJUN HU Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Department of Biological Engineering University of DelawareNewarkDelaware 19716USA Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China College of Optics&Photonics University of Central FloridaOrlandoFlorida 32816USA College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China

3D photonics promises to expand the reach of photonics by enabling the extension of traditional applications to nonplanar geometries and adding novel functionalities that cannot be attained with planar *** material options and device geometries are,however,limited by current fabrication *** this work,we pioneer a method that allows for placement of integrated photonic device arrays at arbitrary predefined locations in 3D using a fabrication process that capitalizes on the buckling of a 2D *** present theoretical and experimental validation of the deterministic buckling process,thus demonstrating implementation of the technique to realize what we believe to be the first fully packaged 3D integrated photonics *** of the platform for mechanical strain sensing is further demonstrated.

关键词： buckling planar photonics

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Nonlinear optical properties of integrated GeSbS chalcogenide waveguides

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Photonics Research 2018年第5期6卷 I0062-I0067页

作者： SAMUEL SERNA HONGTAO LIN CARLOS ALONSO-RAMOS ANUPAMA YADAV XAVIER LE ROUX kathleen richardson ERIC CASSAN NICOLAS DUBREUIL JUEJUN HU LAURENT VIVIEN Centre de Nanosciences et de Nanotechnologies (C2N) CNRS Univ.Paris-Sud Université Paris SaclayC2N Orsay Laboratoire Charles Fabry Institut d'Optique Graduate SchoolCNRS Université Paris Saclay Department of Materials Science and Engineering Massachusetts Institute of Technology-MIT College of Optics and Photonics-CREOL University of Central Florida

In this paper, we report the experimental characterization of highly nonlinear Ge Sb S chalcogenide glass *** used a single-beam characterization protocol that accounts for the magnitude and sign of the real and imaginary parts of the third-order nonlinear susceptibility of integrated Ge23 Sb7 S70(GeSbS) chalcogenide glass waveguides in the near-infrared wavelength range at λ =1580 nm. We measured a waveguide nonlinear parameter of 7.0±0.7 W^(-1)· m(-1), which corresponds to a nonlinear refractive index of n_2=0.93±0.08 × 10^(-18) m^2∕W,comparable to that of silicon, but with an 80 times lower two-photon absorption coefficient βTPA=0.010± 0.003 cm∕GW, accompanied with linear propagation losses as low as 0.5 dB/cm. The outstanding linear and nonlinear properties of Ge Sb S, with a measured nonlinear figure of merit FOMTPA=6.0 ±1.4 at λ =1580 nm, ultimately make it one of the most promising integrated platforms for the realization of nonlinear functionalities.

关键词： Sb Nonlinear optical properties of integrated GeSbS chalcogenide waveguides

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Electrical programmable multilevel nonvolatile photonic random-access memory

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Light(Science & Applications) 2023年第11期12卷 2325-2334页

作者： Jiawei Meng Yaliang Gui Behrouz Movahhed Nouri Xiaoxuan Ma Yifei Zhang Cosmin-Constantin Popescu Myungkoo Kang Mario Miscuglio Nicola Peserico kathleen richardson Juejun Hu Hamed Dalir Volker J.Sorger Department of Electrical and Computer Engineering George Washington UniversityWashington DC 20052USA Florida Semiconductor Institute University of FloridaGainesvilleFL 32603USA Department of Electrical and Computer Engineering University of FloridaGainesvilleFL 32603USA Department of Materials Science&Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA CREOL The College of Optics&PhotonicsUniversity of Central FloridaOrlandoFL 32816USA

Photonic Random-Access Memories(P-RAM)are an essential component for the on-chip non-von Neumann photonic computing by eliminating optoelectronic conversion losses in data *** Phase-Change Materials(PCMs)have been showed multilevel memory capability,but demonstrations still yield relatively high optical loss and require cumbersome WRITE-ERASE approaches increasing power consumption and system package *** we demonstrate a multistate electrically programmed low-loss nonvolatile photonic memory based on a broadband transparent phase-change material(Ge2Sb2Se5,GSSe)with ultralow absorption in the amorphous state.A zero-staticpower and electrically programmed multi-bit P-RAM is demonstrated on a silicon-on-insulator platform,featuring efficient amplitude modulation up to 0.2 dB/μm and an ultralow insertion loss of total 0.12 dB for a 4-bit memory showing a 100×improved signal to loss ratio compared to other phase-change-materials based photonic *** further optimize the positioning of dual microheaters validating performance *** we demonstrate a half-a-million cyclability test showcasing the robust approach of this material and ***-loss photonic retention-of-state adds a key feature for photonic functional and programmable circuits impacting many applications including neural networks,LiDAR,and sensors for example.

关键词： retention random eliminating

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Monolithically integrated stretchable photonics

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Light(Science & Applications) 2017年第1期6卷 210-217页

作者： Lan Li Hongtao Lin Shutao Qiao Yi-Zhong Huang Jun-Ying Li Jérôme Michon Tian Gu Carlos Alosno-Ramos Laurent Vivien Anupama Yadav kathleen richardson Nanshu Lu Juejun Hu Department of Materials Science&Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA Department of Aerospace Engineering and Engineering Mechanics University of Texas at AustinAustinTexasUSA Department of Electronic Engineering Xiamen UniversityXiamenChina Key Laboratory of Optoelectronic Technology&System Education Ministry of ChinaCollege of Opto-Electronic EngineeringChongqing UniversityChongqingChina Centre for Nanoscience and Nanotechnology CNRSUniv.Paris-SudUniversite Paris-SaclayOrsayC2N-OrsayFrance The College of Optics&Photonics University of Central FloridaOrlandoFloridaUSA

Mechanically stretchable photonics provides a new geometric degree of freedom for photonic system design and foresees applications ranging from artificial skins to soft wearable *** we describe the design and experimental realization of the first single-mode stretchable photonic *** devices,made of chalcogenide glass and epoxy polymer materials,are monolithically integrated on elastomer *** impart mechanical stretching capability to devices built using these intrinsically brittle materials,our design strategy involves local substrate stiffening to minimize shape deformation of critical photonic components,and interconnecting optical waveguides assuming a meandering Euler spiral geometry to mitigate radiative optical *** fabricated following such design can sustain 41%nominal tensile strain and 3000 stretching cycles without measurable degradation in optical *** addition,we present a rigorous analytical model to quantitatively predict stressoptical coupling behavior in waveguide devices of arbitrary geometry without using a single fitting parameter.

关键词： chalcogenide glass integrated photonics optical resonator strain-optical coupling stretchable photonics

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霍乱弧菌的运动性和鞭毛结构在其致病过程中的作用

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微生物学免疫学进展 1992年第3期20卷 29-31页

作者： kathleen richardson 杜琳

霍乱毒素(CT)是霍乱弧菌引起腹泻的一个主要原因,而霍乱弧菌只有定居在小肠里才能分泌毒素,有关它的定居机理目前还知道的不多,据报导,菌毛或甘露糖敏感的血细胞凝集素缺失都可能降低霍乱弧菌的定居能力;运动性在其定居过程中也是必须的... 详细信息

霍乱毒素(CT)是霍乱弧菌引起腹泻的一个主要原因,而霍乱弧菌只有定居在小肠里才能分泌毒素,有关它的定居机理目前还知道的不多,据报导,菌毛或甘露糖敏感的血细胞凝集素缺失都可能降低霍乱弧菌的定居能力;运动性在其定居过程中也是必须的,缺乏运动性的霍乱弧菌,其小肠粘附力将会降低;霍乱弧菌的鞭毛外包着一层与外膜连结的鞘,它不仅在霍乱的免疫中起着特殊作用,且与菌体的定居作用有关。

关键词：霍乱弧菌运动性鞭毛致病性

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ROOF 325 Penthouse patio at former kathleen’s 5 spot

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城市漫步（上海版、英文） 2015年第6期 76-76页

作者： BETTY richardson 不详

The place‘NO MUSEUM,’reads a large sign outside the former Shanghai Art Museum at People’s Square,a warning to any tourists who might wander in searching for a little *** might as well read‘Abandon all hope ye who enter here,’for it seems much unfortunate change has been afoot at this imposing Concession-era building,characterized by its gloomy-looking clock tower.

关键词： looking outside searching

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