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. Poynting’s 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 μL)
Bright-field or Dark-field imaging,
Interferometric position detection with QPD
[ The Physics of Optical Tweezers ]
Ray Optics
(D >> λ)
Rayleigh Regime
(D << λ)6
Coffey, V., Optics and Photonics News 2013
[ 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
𝐹"#$% =−𝑛)𝒓𝟑
2𝑁. − 1𝑁. + 2
𝛻 𝐸 .
7
Rayleigh Regime
(D << λ)
[ 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
𝑓4: Roll-off frequency
𝜅 = 𝑓42π𝛾: 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. Maragò,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.Maragó,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.
