Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA.
Opt Lett. 2012 Sep 1;37(17):3681-3. doi: 10.1364/OL.37.003681.
We report a systematic, experimental, and theoretical investigation on the surface plasmon resonance (SPR) sensing using optical disks with different track pitches, including Blu-ray disk (BD), digital versatile disk (DVD), and compact disk (CD). Optical reflection measurements indicate that CD and DVD exhibit much higher SPR sensitivity than BD. Both experiments and finite-difference time-domain simulations reveal that the SPR sensitivity is significantly affected by the diffraction order of the SPR peaks and higher diffraction order results in lower sensitivity. Numerical simulations also show that very high sensitivity (∼1600 nm per refractive index unit) is achievable by CDs.
我们报告了一项使用具有不同轨道间距的光盘（包括蓝光光盘、数字通用光盘和光盘）进行表面等离子体共振（SPR）传感的系统、实验和理论研究。光学反射测量表明，光盘和数字通用光盘比蓝光光盘具有更高的 SPR 灵敏度。实验和时域有限差分模拟都表明，SPR 灵敏度受到 SPR 峰的衍射阶数的显著影响，较高的衍射阶数导致较低的灵敏度。数值模拟还表明，光盘可以实现非常高的灵敏度（约每折射率单位 1600nm）。
