Journal
OPTICS EXPRESS
Volume 20, Issue 22, Pages 24918-24924Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.024918
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012-0003438]
- National Research Foundation of Korea [2011-0014026] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We propose a plasmonic whispering-gallery-mode cavity comprising of a dielectric disk with sub-hundred nanometer thickness sandwiched by two silver disks. By reducing radius and thickness carefully based on the investigated resonant wavelength dependencies, the surface-plasmon-polariton cavity mode with a resonant wavelength of 1550 nm can be confined in a disk with a radius of 88 nm and a thickness of 10 nm, where the physical size of the cavity is 0.000064 lambda(3)(0) (lambda(0): free space wavelength). The cavity mode has a deep subwavelength mode volume of 0.010 (lambda/2n)(3) and a high quality factor of 1900 at 40K, consequently, a large Purcell factor of 1.1 x 10(5). (C) 2012 Optical Society of America
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