λ3/1000 Plasmonic Nanocavities for Biosensing Fabricated by Soft UV Nanoimprint Lithography
λ3/1000 Plasmonic Nanocavities for Biosensing Fabricated by Soft UV Nanoimprint Lithography
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DOI：
10.1021/nl201004c
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发表时间：
2011-09-01
期刊：
影响因子：
10.8
通讯作者：
Collin, Stephane
中科院分区：
文献类型：
--
作者：
Cattoni, Andrea;Ghenuche, Petru;Collin, Stephane
等离子体纳米腔阵列具有非常低的体积，低至λ（3）/1000，已被制造的软UV纳米压印光刻。几乎完美的全向吸收（3-70度）被证明为腔的基模（λ类似或等于1.15 μ m）。当满足临界耦合条件（45-50度，λ类似于或等于750 nm）时，二阶模式表现出具有强角度依赖性和总光学吸收的更尖锐的共振。它导致高折射率灵敏度（405 nm/RIU）和品质因数（类似于21），并为超低体积的高效生物传感实验提供了新的前景。
Arrays of plasmonic nanocavities with very low volumes, down to lambda(3)/1000, have been fabricated by soft UV nanoimprint lithography. Nearly perfect omnidirectional absorption (3-70 degrees) is demonstrated for the fundamental mode of the cavity (lambda similar or equal to 1.15 mu m). The second-order mode exhibits a sharper resonance with strong angular dependence and total optical absorption when the critical coupling condition is fulfilled (45-50 degrees, lambda similar or equal to 750 nm). It leads to high refractive index sensitivity (405 nm/RIU) and figure of merit (similar to 21) and offers new perspectives for efficient biosensing experiments in ultralow volumes.