title: Spectral broadening effects of spontaneous emission and density of state on plasmonic enhancement in cermet waveguides.
abstract: Based on the full integration formula of Purcell factor (PF) deduced from Fermi's Golden Rule, the plasmonic enhancement in Au(1-α)S3N4(α) cermet waveguides is evaluated with the joint impact of finite emission linewidth and the broadening of PF spectrum. The calculation results indicate that the PF would be significantly degraded by the two broadening effects though the SPP resonance frequency can be tuned with different volume fractions (α) of Si3N4. It is also found that the critical emission linewidth is approximately linear to the PF spectrum linewidth. Thus in order to achieve strong plasmonic enhancement, both the emission and PF spectrum linewidths should be dramatically reduced.
authors: Department of Electronic Engineering, State Key Laboratory of Integrated Optoelectronics, Tsinghua University, Beijing 100084, China.
authors: Keyong
authors: K
authors: Chen
authors: Xue
authors: X
authors: Feng
authors: Chao
authors: C
authors: Zhang
authors: Kaiyu
authors: K
authors: Cui
authors: Yidong
authors: Y
authors: Huang