optical nano-tweezers to manipulate and control nano-objects...

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  • Optical Nano-tweezerstoManipulate and ControlNano-objects

    Jonghoon Ahn

    Put page Numbers in!!!!!

    ECE 695 Presentation

    November 15th, Wednesday

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Conventional Tweezers and Nanomaterial ]

    Normal Tweezers

    +

    Marago et al., Nature Nanotech. 2013

    Being able to manipulate and control nanoparticles has become important1

  • [ Nanotube Nano-tweezers ]

    Kim et al., Science 1999

    Mechanical manipulation and interrogation

    of polystyrene nanoclusters (~ 500 nm)

    Nanotweezers can have problems in releasing the nanostructures when opened

    Dominance of van der Waals force and electrostatic forces 2

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Momentum of light before Lasers ]

    Measurement of radiation pressure

    using light sources and a torsion balance

    Nichols, E.F. & Hull G. F, Phys. Rev. 1901

    A very short experience in attempting to

    measure these forces is sufficient to make

    one realize their extreme minuteness,

    a minuteness which appears to put them

    beyond consideration in terrestrial affairs.

    J. H. Poyntings presidential address

    to British Physical Society in 1905

    3

  • [ First Optical Tweezers ]

    Arthur Askin

    Father of optical trapping Ashkin, A., Phys. Rev. Lett. 1970

    4

    First optical tweezer: Tightly focused beam of light holding particles in 3 dimensions

    Observation of optical scattering and gradient forces

    decoupling thermal effects

  • [ Basic Experimental Design ]

    Objective lens with high NA

    Molly J. E. & Padgett, M. J., Contemporary Physics, 2008

    Camera imaging of particle

    5

    Diffraction limited focus spot is produced

    Sample in aqueous solutionDamps Brownian motion (normally ~ 10 L)

    Bright-field or Dark-field imaging,

    Interferometric position detection with QPD

  • [ The Physics of Optical Tweezers ]

    Ray Optics

    (D >> )

    Rayleigh Regime

    (D

  • [ Optical Forces on Nanostructures ]

    Gradient Force electric dipole interaction

    scales down with particle volume

    Brownian motion from thermal fluctuations

    may be large enough to overcome the

    trapping forces at the nanoscale

    "#$% =)

    2. 1. + 2

    .

    7

    Rayleigh Regime

    (D

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Solutions using geometry ]

    Alternative trapping geometry

    (Counter-propagating beams)

    8

    Alternative Particle Geometry

    Woerdemann et al., Opt. Express 2010

    Pauzauskie et al., Nature Mater. 2006

    Stronger gradient force Larger trapping volume

  • [ Plasmon Tweezers ]

    Capacitive effect leads to an intense hot-spot

    Drawback : Heating from the plasmonic nanostructures

    Plasmonic Antennas

    9

    Reece, P. J., Nature Photon. 2008

    Grigorenko et. al., Nature Photon. 2008

    Identical metal structures with nanogap

  • [ Plasmon Tweezers with heat sink ]

    Wang et. al., Nature Commun. 2011

    Integrated heat sink

    10

    ~100 fold reduction in heating

    Fundamental issue: Ohmic loss resulting in heating

  • [ Hybrid Electrothermoplasmonic Nanotweezer ]

    Fast delivery of single particles to nanoantenna without agglomeration

    AC field bias + Photo-induced heating Electrical body Force11

    Ndukaife et. al., Nature Nanotech. 2016

  • [ Hybrid Electrothermoplasmonic Nanotweezer ]

    Particle trapping and immobilization sequence 12

    Ndukaife et. al., Nature Nanotech. 2016

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Force Measurement ]

    Power Spectral Density

    13

    Microscopic spring

    4: Roll-off frequency = 42: Trap Stiffness

    Biological Applications

    Moffitt et al., Annu. Rev. Biochem. 2008Dienerowitz et. al., J. Nanophoton. 2008

    Measurement of RNA hairpin

    undergoing conformational transitions

  • [ Spectroscopic Optical Tweezers ]

    14Marago et al., Nature Nanotech 2013

    Marago et al., Physica E. 2008

    Marago et al., ACS Nano. 2010

  • [ Optomechanics with Levitated Nanoparticles ]

    Study of mechanical motion induced by optical forces

    Ultra-sensitive torque measurements may be achieved with laser cooling

    Laser cooling of nanoparticles

    15

    Li et al., Nature Phys. 2011

    Torsional Motion of

    Nonspherical Nanoparticles

    Hoang et al., Phys. Rev. Lett 2016

  • [ Table of Contents ]

    1. Introduction

    2. Optical Tweezers

    3. Optical Manipulation of Nanoparticles

    4. Applications of Optical Nano-tweezers

    5. Summary

  • [ Summary ]

    Non-invasive characteristics and its ability to control and manipulate nanoparticles.

    Gradient force from tightly focused laser beam to hold particles in all 3 dimensions.

    Various techniques are introduced to overcome the decrease in gradient force for

    nanoscale particles.

    Applications in diverse fields Manipulation of nanostructures, force measurement,

    spectroscopy, optomechanics 16

  • Thank you

  • [ References ]

    1. Marag,O.M.,Jones,P.H.,Gucciardi,P.G.,Volpe,G.,&Ferrari,A.C.(2013).Opticaltrappingandmanipulationofnanostructures.Naturenanotechnology,8(11),807-819.2. Kim,P.,&Lieber,C.M.(1999).Nanotubenanotweezers.Science,286(5447),2148-2150.3. Nichols,E.F.,&Hull,G.F.(1901).Apreliminarycommunicationonthepressureofheatandlightradiation.PhysicalReview(SeriesI),13(5),307.4. Ashkin,A.(1970).Accelerationandtrappingofparticlesbyradiationpressure.Physicalreviewletters,24(4),156.5. Coffey,V.(2013).Thetiniesttraps:opticalmanipulationgetssmaller.OpticsandPhotonicsNews,24(4),24-31.6. Woerdemann,M.,Berghoff,K.,&Denz,C.(2010).Dynamicmultiple-beamcounter-propagatingopticaltrapsusingopticalphase-conjugation.Opticsexpress,18(21),22348-22357.7. Pauzauskie,P.J.,Radenovic,A.,Trepagnier,E.,Shroff,H.,Yang,P.,&Liphardt,J.(2006).Opticaltrappingandintegrationofsemiconductornanowireassembliesinwater.Naturematerials,5(2),97-101.8. Reece,P.J.(2008).Plasmonics:Fineropticaltweezers.NaturePhotonics,2(6),333-334.9. Grigorenko,A.N.,Roberts,N.W.,Dickinson,M.R.,&Zhang,Y.(2008).Nanometricopticaltweezersbasedonnanostructuredsubstrates.NaturePhotonics,2(6),365-370.10. Wang,K.,Schonbrun,E.,Steinvurzel,P.,&Crozier,K.B.(2011).Trappingandrotatingnanoparticlesusingaplasmonicnano-tweezerwithanintegratedheatsink.Naturecommunications,2,ncomms1480.11. Ndukaife,J.C.,Kildishev,A.V.,Nnanna,A.G.A.,Shalaev,V.M.,Wereley,S.T.,&Boltasseva,A.(2016).Long-rangeandrapidtransportofindividualnano-objectsbyahybridelectrothermoplasmonicnanotweezer.Naturenanotechnology,11(1),53-59.12.Dienerowitz,M.,Mazilu,M.,&Dholakia,K.(2008).Opticalmanipulationofnanoparticles:areview.JournalofNanophotonics,2(1),021875-021875.13.Moffitt,J.R.,Chemla,Y.R.,Smith,S.B.,&Bustamante,C.(2008).Recentadvancesinopticaltweezers.Annualreviewofbiochemistry,77.14.Marago,O.M.,Gucciardi,P.G.,Bonaccorso,F.,Calogero,G.,Scardaci,V.,Rozhin,A.G.,...&Denti,P.(2008).Opticaltrappingofcarbonnanotubes.PhysicaE:Low-dimensionalSystemsandNanostructures,40(7),2347-2351.15.Marag,O.M.,Bonaccorso,F.,Saija,R.,Privitera,G.,Gucciardi,P.G.,Iati,M.A.,...&Nicolosi,V.(2010).Brownianmotionofgraphene.ACSnano,4(12),7515-7523.16.Li,T.,Kheifets,S.,&Raizen,M.G.(2011).Millikelvincoolingofanopticallytrappedmicrosphereinvacuum.NaturePhysics,7(7),527-530.17.Hoang,T.M.,Ma,Y.,Ahn,J.,Bang,J.,Robicheaux,F.,Yin,Z.Q.,&Li,T.(2016).Torsionaloptomechanicsofalevitatednonsphericalnanoparticle.Physicalreviewletters,117(12),123604.

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