Enhanced interaction strength for a square plasmon resonator embedded in a photonic crystal nanobeam cavity
نویسندگان
چکیده
The deployment of nanocavities may efficiently enhance the light-matter interaction for photonic components on chip. Three nanoscale cavity designs are investigated, including the one-dimensional (1-D) photonic crystal (PhC) nanobeam cavity, inline waveguide-integrated plasmon cavity, and square plasmon resonator embedded in the 1-D PhC nanobeam cavity (i.e., Combo cavity). The cavity performance, such as quality and Purcell factor, mode volume, and light-matter interaction strength, are evaluated for each structure for comparison. A deep subwavelength mode volume of 0.18 ðλ∕2nÞ3 is observed in the Combo cavity, which exhibits an improved Purcell factor up to 428 and a 44 times enhanced interaction strength due to the compressed mode volume compared to the inline plasmon cavity. Thus, the Combo cavity shows promise of becoming a potential building block for active components of next-generation onchip photonic circuits. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE) [DOI: 10 .1117/1.JNP.9.XXXXXX]
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