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Electromagnetic Analysis of Ring-Cavity-Assisted Amplified Spontaneous Emission in Er:SiO _{2} /a-Si Horizontal Slot Waveguides

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3 Author(s)
Brandon Redding ; Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE ; Shouyuan Shi ; Dennis W. Prather

In this paper, we present an electromagnetic analysis of ring-cavity-assisted amplified spontaneous emission in Er3 +-doped SiO2 (Er:SiO2 ). A horizontal slot geometry, consisting of a low-index Er:SiO2 layer embedded between high-index a-Si layers, allows for a planar ring-cavity design which maintains high optical confinement in the active Er:SiO2 material. The simulations are performed within the auxiliary differential equation-finite-difference time-domain (ADE-FDTD) scheme which couples the quantum mechanical light emission and amplification behavior of the Er:SiO2 with the electromagnetic device behavior. We present the enhanced spontaneous emission in waveguide-coupled ring cavities with varying coupling gaps. We provide an analysis of the relationship between cavity quality factor, coupling coefficient, and enhanced spontaneous emission.

Published in:

IEEE Journal of Quantum Electronics  (Volume:45 ,  Issue: 7 )