NAKATANI RIES白鳥最終プレゼン「The interaction of gold nanostructure with different laser polarizations in COMSOL simulation」

NAKATANI RIES白鳥最終プレゼン「The interaction of gold nanostructure with different laser polarizations in COMSOL simulation」

1. NAKATANI RIES 2018 １ K. Shiratori, 1,* M. Abbasi, 2 C. Evans, 3 and D. Natelson 2,3 1 Dept. of Phys. Sci., Ritsumeikan Univ. 2 Dept. of Elec. and Comp. Eng., Rice Univ. 3 Dept. of Phys. and Astro., Rice Univ. The interaction of gold nanostructures with different laser polarizations in COMSOL simulation

2. Contents 2 Plasmonics : Study and Application of Plasmons Objective Approaches : Experimental and Simulation Results & Discussion Impressions Next Steps

3. 3 Introduction LASER LASER Free electrons behave as a fluid . these electrons oscillate collectively, causing ripples like water. Surface Plasmon Resonance (SPR) A resonance between plasmons and the electric field Plasmons the collective oscillation Surface Plasmon Polariton (SPP) plasmons and the electric field

4. 4 Introduction Fig. 1. : A localized surface plasmon[1] localized surface plasmon resonance (LSPR) can cause large enhancements in the electric field[1]. Surface-enhanced Raman spectroscopy (SERS) and other techniques to measure the dynamics of a single molecule [2]. [1] K. Willets et al., Annu . Rev. Phys. Chem., 58 :267-297(2007) [2] C. Evans et al., J. Nano Lett. , 17 . 5646-5652(2017) green red        

5. 5 To simulate the thermoelectric detection of SPP in gold nanostructures Objective

6. 6 Experiment side Method Fig. 2. Schematic of experiment[4] 785nm Optical Chopper [4] P. Zolotavin et al., J. Nanoscale, 9 . 9160-9166(2017) Measured the photothermoelectric effect of gold nanostructures.

7. 7 Experiment side Method Fig. 3. Photothermoelectric (PTE) map under (a) 0 and (b) 90 laser polarization.   a b E E

8. Simulation side Method 3D modeling of the sample with smooth edges A cross-platform finite element analysis, solver and multiphysics simulation software SiO 2 Gold 1.2μm 490nm 100nm 1.9μm Perfectly Matched Layer (PML) Mesh Plane Wave 8

9. 9 Total field Polarization along x-axis Polarization along z-axis Results & Discussion a1 b1 E E Fig. 4. Simulation results: Total field of the device under 0 polarization a1 and under 90 polarization b1  

10. 10 Energy absorption Polarization along x-axis Polarization along z-axis Results & Discussion a2 b2 E E Fig. 5. Simulation results: Energy absorption of the device under 0 polarization a2 and under 90 polarization b2  

11. 11 The U.S. is huge, adventurous and interesting!! Impressions

12. 12 Next Steps ✔️ Apply for Rice University, Applied Physics