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Nano-Optical Manipulation Using Resonant Radiation Force

Nano-Optical Manipulation Using Resonant Radiation Force.

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Nano-Optical Manipulation Using Resonant Radiation Force

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  1. Nano-Optical Manipulation Using Resonant Radiation Force T.Iida and H. Ishihara, Nano-Optical Manipulation Using Resonant Radiation Force,in Progress in Nano-Electro-Optics VI: Nano Optical Probing, Manipulation, Analysis, and Their Theoretical Bases, edited by Motoichi Ohtsu (Springer-Verlag, Berlin 2008), pp.115-168. Ashida Lab. Bando Shinichiro

  2. Contents • Introduction ・Sample ・Optical manipulation ・Resonant light • Motivation • Experiment ・laser ablation ・manipulation laser 　　　 ・setup • Result • Summary

  3. quantum size effect energy level is discrete exciton coulomb interaction electron hole Sample CuCl ・wide-gap semiconductor：3.4eV ・ large excitonbindingenergy:197meV Excitons in CuCl nanoparticle exciton Need to sort out size of particle for application radius

  4. Optical manipulation Scat.+Abs. force Gradient force force absorption scattering

  5. Gravity Size dependence of the acceleration induced by the radiation force Light-matter interaction becomes too weak in nanoparticle Scat.+Abs. force becomes very small

  6. Resonance Non-resonance Gravity Resonantlight Radiation force becomes very large using resonant light

  7. Resonant radiation force Energy of incident light

  8. Motivation Using resonant radiation force Controlling the nano-size particles size-selection by accessing quantum mechanical individualities

  9. Nd: YAG laser Experimentalcondition Laser ablation wavelength ： 532nm （2.33eV） pulse width ： 10ns repetition ： 10Hz intensity ： 0.3J/cm2 Manipulation laser

  10. Setup Si substrate CuCl Ablation laser CuCl Si substrate Ablation laser Manipulation laser Manipulation laser Si substrate Nd:YAG laser Ti:sapphire laser

  11. Result Nd:YAG laser Ti:sapphire laser

  12. Summary ・　Succeed incontrolling nano-particles using resonant light. Future plan ・　Study of the possibility of nanoscale size selection

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