Browsing by Author "Lu, Shao-Ping"

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High sensitivity plasmonic index sensor using slab-like gold nanoring array
(2011)
Tsai, Chia-Yang
;
Lu, Shao-Ping
;
Lin, Jyun-Wei
;
Lee, Po-Tsung
;
光電工程學系
We investigate the index sensing characteristics of plasmonic arrays based on square lattice slab-like gold nanorings with different ring widths. High sensitivity of 691 nm per RIU is obtained for nanorings with 199 nm width. (C) 2010 Optical Society of America
High sensitivity plasmonic index sensor using slablike gold nanoring arrays
(2011-04-11)
Tsai, Chia-Yang
;
Lu, Shao-Ping
;
Lin, Jyun-Wei
;
Lee, Po-Tsung
;
光電工程學系
We investigate the index sensing characteristics of plasmonic arrays based on square lattice slablike gold nanorings (NRs) with different ring widths. The gold NR arrays exhibit two extinction peaks in the visible and near-infrared corresponding to antibonding and bonding modes. Redshift and blueshift in antibonding and bonding modes when broadening the average ring width are observed. We experimentally demonstrate the sensitivity of bonding mode can be tuned by varying the average ring width. High sensitivity of 691 nm per refractive index unit is obtained for NRs with 199 nm average ring width. (C) 2011 American Institute of Physics. [doi:10.1063/1.3579536]
Square lattice photonic crystal surface mode lasers
(2010-12-06)
Lu, Tsan-Wen
;
Lu, Shao-Ping
;
Chiu, Li-Hsun
;
Lee, Po-Tsung
;
光電工程學系
In this report, we propose a square lattice photonic crystal heteroslab-edge microcavity design. In numerical simulations, three surface modes in this microcavity are investigated and optimized by tuning the slab-edge termination tau and gradual mirror layer. High simulated quality (Q) factor of 2.3 x 10(5) and small mode volume of 0.105 mu m(3) are obtained from microcavity with tau = 0.80. In experiments, we obtain and identify different surface modes lasing. The surface mode in the second photonic band gap shows a very-low threshold of 140 mu W and high Q factor of 5,500, which could be an avenue to low-threshold optical lasers and highly sensitive sensor applications with efficient light-matter interactions. c 2010 Optical Society of America