Design of ultrasmall plasmonic coaxial lasers on Si

Kim-Peng Lim; Chee-Wei Lee; Gurpreet Singh; Qian Wang

doi:10.1117/1.JNP.7.070598

16 December 2013 Design of ultrasmall plasmonic coaxial lasers on Si

Kim-Peng Lim, Chee-Wei Lee, Gurpreet Singh, Qian Wang

Author Affiliations +

Journal of Nanophotonics, Vol. 7, Issue 1, 070598 (December 2013). https://doi.org/10.1117/1.JNP.7.070598

Abstract

An ultrasmall plasmonic coaxial laser made of metal–semiconductor–metal on a silicon substrate through an interlayer bonding was designed. From the effective refractive indices and the transparent material gain, the nanoscale structural dimensions with both the radius and the width at 80 nm for the coaxial plasmonic waveguide were decided. The influence of the interlayer bonding material on the optimization of resonant wavelength and Q-factor was evaluated. A three-dimensional body-of-revolution finite-difference time-domain method was used to show that a coaxial cavity with a SiO₂ interlayer can laze at around 1480-nm wavelength with a net optical threshold power density of about 800 W/cm₂ and a subwavelength mode volume of 0.014(λ/2n)³. This nanolaser on silicon platform will benefit those working on nanophotonic integrated circuits.

Citation Download Citation

Kim-Peng Lim, Chee-Wei Lee, Gurpreet Singh, and Qian Wang "Design of ultrasmall plasmonic coaxial lasers on Si," Journal of Nanophotonics 7(1), 070598 (16 December 2013). https://doi.org/10.1117/1.JNP.7.070598

Published: 16 December 2013

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