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Self-aligned single-electrode actuation of tangential and wineglass modes using PMN-PT

Microsystems & Nanoengineering 2023年第3期9卷 43-49页

作者： Ozan Erturk Kilian Shambaugh Ha-Seong Park Sang-Goo Lee Sunil A.Bhave OxideMEMS Lab Purdue UniversityWest LafayetteINUSA Polytec inc. IrvineCAUSA iBULe photonics Company Ltd. Incheon 21999South Korea

Considering the evolution of rotation sensing and timing applications realized in micro-electro-mechanical systems(MEMS),flexural mode resonant shapes are outperformed by bulk acoustic wave(BAW)counterparts by achieving higher frequencies with both electrostatic and piezoelectric *** the 1-30 MHz range,which hosts BAW gyroscopes and timing references,piezoelectric and electrostatic MEMS have similar transduction ***,when designed intelligently,electrostatic transduction allows self-alignment between electrodes and the resonator for various BAW modes,misalignment is inevitable regarding piezoelectric transduction of BAW modes that require electrode *** this paper transverse piezoelectric actuation of[011]oriented single crystal lead magnesium niobate-lead titanate(PMN-PT)thin film disks are shown to excite the tangential mode and family of elliptical compound resonant modes,utilizing a self-aligned and unpatterned electrode that spans the entire disk *** resonant mode coupling is achieved by employing a unique property of[011]PMN-PT,where the in-plane piezoelectric coefficients have opposite *** 1-port disk transducers,RF reflection measurements are performed that demonstrate the compound mode family shapes in the 1-30 MHz *** verification of mode transduction is achieved using in-plane displacement measurements with Polytec’s laser Doppler vibrometer(LDV).While the tangential mode achieves a 40°/s dithering rate at 335 kHz resonant frequency,the n=2 wine-glass mode achieves 11.46 nm tip displacement at 8.42 MHz resonant frequency on a radius of 60μm disk resonator in air.A single electrode resonator that can excite both tangential and wine-glass modes with such metrics lays the foundation for a BAW MEMS gyroscope with a built-in primary calibration stage.

关键词： resonator electrode piezoelectric

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Opening a new route to multiport coherent XUV sources via intracavity high-order harmonic generation

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Light(Science & Applications) 2020年第1期9卷 398-406页

作者： Natsuki Kanda Tomohiro Imahoko Koji Yoshida Akihiro Tanabashi AAmani Eilanlou Yasuo Nabekawa Tetsumi Sumiyoshi Makoto Kuwata-Gonokami Katsumi Midorikawa RIKEN center for Advanced photonics RIKENWakoSaitama 351-0198Japan Photon Science center The University of TokyoTokyo 113-8656Japan Intstitute for Solid State Physics The University of TokyoKashiwaChiba 277-8581Japan Cyber laser inc. WakoSaitama 351-0104Japan Institute for Photon Science and Technology The University of TokyoTokyo 113-0033Japan Department of Physics The University of TokyoTokyo 113-0033Japan

High-order harmonic generation(HHG)is currently utilized for developing compact table-top radiation sources to provide highly coherent extreme ultraviolet(XUV)and soft X-ray pulses;however,the low repetition rate of fundamental lasers,which is typically in the multi-kHz range,restricts the area of application for such HHG-based radiation ***,we demonstrate a novel method for realizing a MHz-repetition-rate coherent XUV light source by utilizing intracavity HHG in a mode-locked oscillator with an Yb:YAG thin disk laser medium and a 100-m-long ring *** have successfully implemented HHG by introducing two different rare gases into two separate foci and picking up each HH *** to the two different HH beams generated from one cavity,this XUV light source will open a new route to performing a time-resolved measurement with an XUV-pump and XUV-probe scheme at a MHzrepetition rate with a femtosecond resolution.

关键词： intracavity coherent repetition

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Using LiF crystals for high-performance neutron imaging with micron-scale resolution

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High Power laser Science and Engineering 2015年第4期3卷 1-9页

作者： A.Faenov M.Matsubayashi T.Pikuz Y.Fukuda M.Kando R.Yasuda H.Iikura T.Nojima T.Sakai M.Shiozawa R.Kodama Y.Kato Institute for Academic Initiatives Suita Osaka University Joint Institute for High Temperatures Russian Academy of Sciences Quantum Beam Science center Japan Atomic Energy Agency PPC and Graduate School of Engineering Suita Osaka University Nippon SOKEN Inc. The Graduate School for the Creation of New photonics Industries

This paper describes an overview of our recent discovery – clear demonstration that Li F crystals can be efficiently used as a high-performance neutron imaging detector based on optically stimulated luminescence of color centers generated by neutron irradiation. It is shown that the neutron images we have obtained are almost free from granular noise, have a spatial resolution of～5.4 μm and a linear response with a dynamic range of at least 103. The high contrast and good sensitivity of Li F crystals allow us to distinguish two holes with less than 2% transmittance difference. We propose to use such detectors in areas where high spatial resolution with high image gradation resolution is needed, inc.uding diagnostics of different plasma sources such as laser and z-pinc. produced plasmas.

关键词： color centers Li F crystals neutron imaging neutrons plasma diagnostics

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Physiological Fluid Specific Agglomeration Patterns Diminish Gold Nanorod Photothermal Characteristics

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Advances in Nanoparticles 2013年第4期2卷 336-343页

作者： Kristen K. Comfort Jared W. Speltz Bradley M. Stacy Larry R. Dosser Saber M. Hussain Molecular Bioeffects Branch Human Effectiveness Directorate Air Force Research Laboratory Wright-Patterson Air Force Base Dayton USA Molecular Bioeffects Branch Human Effectiveness Directorate Air Force Research Laboratory Wright-Patterson Air Force Base Dayton USA Department of Chemical and Materials Engineering University of Dayton Dayton USA mound laser & photonics center inc. Miamisburg USA

Investigations into the use of gold nanorods (Au-NRs) for biological applications are growing exponentially due to their distinc.ive physicochemical properties, which make them advantageous over other nanomaterials. Au-NRs are particularly renowned for their plasmonic characteristics, which generate a robust photothermal response when stimulated with light at a wavelength matching their surface plasmon resonance. Numerous reports have explored this nanophotonic phenomenon for temperature driven therapies;however, to date there is a significant knowledge gap pertaining to the kinetic heating profile of Au-NRs within a controlled physiological setting. In the present study, the impact of environmental composition on Au-NR behavior and degree of laser actuated thermal production was assessed. Through acellular evaluation, we identified a loss of photothermal efficiency in biologically relevant fluids and linked this response to excessive particle aggregation and an altered Au-NR spectral profile. Furthermore, to evaluate the potential impact of solution composition on the efficacy of nano-based biological applications, the degree of targeted cellular destruction was ascertained in vitro and was found to be susceptible to fluid-dependent modifications. In summary, this study identified a diminution of Au-NR nanophotonic response in artificial physiological fluids that translated to a loss of application efficiency, pinpointing a critical concern that must be considered to advance in vivo, nano-based bio-applications.

关键词： Gold Nanorod Nanophotonic Agglomeration Artificial Physiological Fluid Photothermal Application

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Dynamic performance and reflection sensitivity of quantum dot distributed feedback lasers with large optical mismatch

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photonics Research 2021年第8期9卷 1550-1558页

作者： BOZHANG DONG JIANAN DUAN HEMING HUANG JUSTIN CNORMAN KENICHI NISHI KEIZO TAKEMASA MITSURU SUGAWARA JOHN EBOWERS FRéDéRIC GRILLOT LTCI Telecom ParisInstitut Polytechnique de Paris19 Place Marguerite Perey91120 PalaiseauFrance Institute for Energy Efficiency University of CaliforniaSanta BarbaraCalifornia 93106USA Materials Department University of CaliforniaSanta BarbaraCalifornia 93106USA QD laser Inc.KawasakiKanagawa 210-0855Japan Department of Electrical and Computer Engineering University of CaliforniaSanta BarbaraCalifornia 93106USA center for High Technology Materials University of New-MexicoAlbuquerqueNew Mexico 87106USA Current address:State Key Laboratory on Tunable laser Technology School of Electronic and Information EngineeringHarbin Institute of TechnologyShenzhen 518055China

This work reports on a high-efficiency In As/Ga As distributed feedback quantum dot *** large optical wavelength detuning at room temperature between the lasing peak and the gain peak causes the static,dynamic,and nonlinear intrinsic properties to all improve with temperature,inc.uding the lasing efficiency,the modulation dynamics,the linewidth enhancement factor,and consequently the reflection *** reported show an optimum operating temperature at 75°C,highlighting the potential of the large optical mismatch assisted single-frequency laser for the development of uncooled and isolator-free high-speed photonic integrated circuits.

关键词： mismatch optical tuning

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3D-printed facet-attached microlenses for advanced photonic system assembly

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Light(Advanced Manufacturing) 2023年第2期4卷 1-17页

作者： Yilin Xu Pascal Maier Mareike Trappen Philipp-Immanuel Dietrich Matthias Blaicher Rokas Jutas Achim Weber Torben Kind Colin Dankwart Jens Stephan Andreas Steffan Amin Abbasi Padraic Morrissey Kamil Gradkowski Brian Kelly Peter O’Brien Wolfgang Freude Christian Koos Institute of photonics and Quantum Electronics(IPQ) Karlsruhe Institute of Technology(KIT)Engesserstr.576131 KarlsruheGermany Institute of Microstructure Technology(IMT) KITHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Vanguard Automation GmbH Gablonzer Strasse.1076185 KarlsruheGermany ficon TEC Service GmbH Im Finigen 328832 AchimGermany II-VI inc. Reuchlinstraße 10/1110553 BerlinGermany photonics Research Group Ghent University-imecTechnologiepark-Zwijnaarde 126B-9052 GentBelgium Tyndall National Institute T12 R5CP CorkIreland Eblana photonics Ltd. West Pier Business Campus3 Old Dunleary RdDún LaoghaireDublinA96 A621Ireland

Wafer-level mass production of photonic integrated circuits(PIC)has become a technological mainstay in the field of optics and photonics,enabling many novel and disrupting a wide range of existing ***,scalable photonic packaging and system assembly still represents a major challenge that often hinders commercial adoption of PIC-based ***,chip-to-chip and fiber-to-chip connections often rely on so-called active alignment techniques,where the coupling efficiency is continuously measured and optimized during the assembly *** unavoidably leads to technically complex assembly processes and high cost,thereby eliminating most of the inherent scalability advantages of PIC-based *** this paper,we demonstrate that 3D-printed facet-attached microlenses(FaML)can overcome this problem by opening an attractive path towards highly scalable photonic system assembly,relying entirely on passive assembly techniques based on industry-standard machine vision and/or simple mechanical *** can be printed with high precision to the facets of optical components using multi-photon lithography,thereby offering the possibility to shape the emitted beams by freely designed refractive or reflective ***,the emitted beams can be collimated to a comparatively large diameter that is independent of the device-specific mode fields,thereby relaxing both axial and lateral alignment ***,the FaML concept allows to insert discrete optical elements such as optical isolators into the free-space beam paths between PIC *** show the viability and the versatility of the scheme in a series of selected experiments of high technical relevance,comprising pluggable fiber-chip interfaces,the combination of PIC with discrete micro-optical elements such as polarization beam splitters,as well as coupling with ultra-low back-reflection based on non-planar beam paths that only comprise tilted optical *** on our re

关键词： Photonic integration Photonic assembly Photonic packaging Additive laser manufacturing Multi-photon lithography Facet-attached microlenses Optical alignment tolerances Fiber-chip coupling Hybrid multi-chip modules

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Integrating planar photonics for multi-beam generation and atomic clock packaging on chip

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Light(Science & Applications) 2023年第4期12卷 691-701页

作者： Chad Ropp Wenqi Zhu Alexander Yulaev Daron Westly Gregory Simelgor Akash Rakholia William Lunden Dan Sheredy Martin MBoyd Scott Papp Amit Agrawal Vladimir Aksyuk Physical Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD 20899USA Department of Chemistry and Biochemistry University of MarylandCollege ParkMD 20742USA Vector Atomic Inc.PleasantonCA 94588USA Physical Measurement Laboratory National Institute of Standards and TechnologyBoulderCO 80305USA

The commercialization of atomic technologies requires replacing laboratory-scale laser setups with compact and manufacturable optical *** arrangements of free-space beams can be generated on chip through a combination of integrated photonics and metasurface *** this work,we combine these two technologies using flip-chip bonding and demonstrate an integrated optical architecture for realizing a compact strontium atomic *** planar design inc.udes twelve beams in two co-aligned magneto-optical *** beams are directed above the chip to intersect at a central location with diameters as large as 1 *** design also inc.udes two co-propagating beams at lattice and clock *** beams emit collinearly and vertically to probe the center of the magneto-optical trap,where they will have diameters of≈100μ*** these devices we demonstrate that our integrated photonic platform is scalable to an arbitrary number of beams,each with different wavelengths,geometries,and polarizations.

关键词： planar diameters atomic

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Four-wave mixing in 1.3 μm epitaxial quantum dot lasers directly grown on silicon

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photonics Research 2022年第5期10卷 1264-1270页

作者： JIANAN DUAN BOZHANG DONG WENG W.CHOW HEMING HUANG SHIHAO DING SONGTAO LIU JUSTIN C.NORMAN JOHN E.BOWERS FREDEIC GRILLOT LTCI Telecom ParisInstitut Polytechnique de Pahs91120 PalaiseauFrance Sandia National Laboratories AlbuquerqueNew Mexico 87185USA Institute for Energy Efficiency University of California Santa BarbaraSanta BarbaraCalifornia 93106USA center for High Technology Materials University of New-MexicoAlbuquerqueNew Mexico 87106USA State Key Laboratory on Tunable laser Technology School of Electronic and Information EngineeringHarbin Institute of TechnologyShenzhen 518055China Ayar Labs Santa ClaraCalifornia 95054USA Quintessent Inc.GoletaCalifornia 93117USA

This work compares the four-wave mixing(FWM)effect in epitaxial quantum dot(QD)lasers grown on silicon with quantum well(QW)lasers.A comparison of theory and experiment results shows that the measured FWM coefficient is in good agreement with theoretical *** gain in signal power is higher for p-doped QD lasers than for undoped lasers,despite the same FWM *** to the near-zero linewidth enhancement factor,QD lasers exhibit FWM coefficients and conversion efficiency that are more than one order of magnitude higher than those of QW ***,this leads to self-mode locking in QD *** findings are useful for developing on-chip sources for photonic integrated circuits on silicon.

关键词： lasers quantum mixing

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