surface plasmon hybridization of whispering gallery mode microdisk laser
TRANSCRIPT
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Surface Plasmon Hybridization of Whispering Gallery Mode Microdisk Laser
Oka Kurniawan
Iftikhar Ahmed
Er Ping Li
Photonics Global
14th to 16th December 2010
Singapore
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Plasmonics promises both high speed and miniaturization
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NanoPlasmonics (A*STAR-SERC)
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Research on Plasmonics source is essential
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Previous works have shown progress though having low intensity
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Akimov, A. V., A. Mukherjee, C. L. Yu, D. E. Chang, A. S. Zibrov, P. R. Hemmer, H. Park, and M. D. Lukin. “Generation of single optical plasmons in metallic nanowires coupled to quantum dots.” Nature 450, no. 7168 (November 2007): 402-406.
KollerD.M. “Organic plasmon-emitting diode.” Nat Photon 2, no. 11 (November 2008): 684-687.
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Metal-insulator-metal structure can excite surface plasmon and coupled directly to waveguide
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Walters, R. J., R. V. A. van Loon, I. Brunets, J. Schmitz, and A. Polman. “A silicon-based electrical source of surface plasmon polaritons.” Nat Mater 9, no. 1 (January 2010): 21-25.
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We use microdisk laser cavity structure to obtain high intensity output
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metal
semiconductor
metal
MSMsource
MIMwaveguide
MIMcircuits
Radius = 1 µmLayer thicknesses = 120 nm
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Finite-difference time domain method with realistic solid-state model and Lorentz-Drude model is used for simulation
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Multi-electron multi-level model for modeling electron dynamic in semiconductor. The model can model stimulated emission in laser.
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Conventional microdisk shows whispering gallery mode
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Total electric field at the centre plane of the microdisk
Electric field peak intensity at 1.47 µm.
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Attaching metal layers hybridize the whispering gallery mode with surface plasmon polariton mode
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Total electric field at middle plane of the plasmonic microdisk.
Electric field enhancement is about 20,000 times at 1.47 µm.
Comparison of whispering gallery mode and surface plasmon polariton mode.
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We can couple the plasmonic source to an MIM waveguide with high efficiency
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Metal
Semiconductor
Metal
Metal
Insulator
Metal
Side view
Gap = 20 nm
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We observed the surface plasmon polariton wave traveling along the waveguide and the coupling efficiency is about 60%
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Normalized electric field at the middle of the plane. The intensity at the waveguide is 60% of the microdisk.
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Summary
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