Special Section on Nanoplasmonics

Enhanced interaction strength for a square plasmon resonator embedded in a photonic crystal nanobeam cavity

[+] Author Affiliations
Ke Liu

George Washington University, School of Engineering and Applied Science, Department of Electrical and Computer Engineering, Washington, DC 20052, United States

Beijing University of Technology, The Key Laboratory of Optoelectronics Technology, Ministry of Education, Beijing 100124, China

Volker J. Sorger

George Washington University, School of Engineering and Applied Science, Department of Electrical and Computer Engineering, Washington, DC 20052, United States

J. Nanophoton. 9(1), 093790 (Jan 16, 2015). doi:10.1117/1.JNP.9.093790
History: Received October 31, 2014; Accepted December 19, 2014
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Abstract.  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 (λ/2n)3 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 on-chip photonic circuits.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Ke Liu and Volker J. Sorger
"Enhanced interaction strength for a square plasmon resonator embedded in a photonic crystal nanobeam cavity", J. Nanophoton. 9(1), 093790 (Jan 16, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093790


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