The spontaneous emission (SE) of Er3+ embedded in a
double slot dielectric structure was studied by a quantum-electrody-
namical formalism. The study shows that the slot width and the position
of Er3+ in slot structure have a significant effect on
the SE. The double slot waveguides were fabricated by embedding two
low-index Er/Yb silicate material layers into high-index silicon.
The radiative efficiency of Er3+ in the double slot waveguides
is found to be higher than that of the single slot waveguide, which
is consistent with the theory simulation. The 0.67 dB signal enhancement
at 1.53
and the Program for New Century Excellent Talents in University.
National Natural Science Foundation of China(61377056)
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Figure 1
(Color online) (a) Single-slot; (b) double-slot waveguide.
Figure 2
(Color online) (a) SE enhancement factor
Figure 3
(Color online) (a) SE enhancement factor
Figure 4
(Color online) Dissipated power density of a dipole in single and double slot waveguide.
Figure 5
(Color online) Improved effective QE as a result of added slot structure for an initial QE of (a) 0.2, (b) 0.5.
Figure 6
Cross-section SEM image of the fabricated double-slot waveguide.
Figure 7
(Color online) The 1.53
Figure 8
(Color online) (a) The signal enhancement spectrum for the pump power of 372 mW; (b) the signal enhancement with a function of pump power.
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