宽谐振区的光学纳米天线的谐振

袁纵横; 苏睿; 黄静

doi:10.3788/OPE.20132106.1518

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宽谐振区的光学纳米天线的谐振

微纳技术与精密机械 | 更新时间：2020-08-12

- 宽谐振区的光学纳米天线的谐振
- Resonance of Optical Nano-Antenna with Wider Resonant Areas
- 光学精密工程 2013年21卷第6期页码：1518-1523
- 作者机构：
  
  贵州民族大学信息工程学院2. 桂林电子科技大学电子工程与自动化学院
- 作者简介：
- 基金信息：
  
  贵州省科技厅国际科技合作计划()
- DOI：10.3788/OPE.20132106.1518
  中图分类号： TN820
- 收稿日期：2013-01-04，
  
  修回日期：2013-02-21，
  
  网络出版日期：2013-06-20，
  
  纸质出版日期：2013-06-15
- 稿件说明：
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袁纵横苏睿黄静. 宽谐振区的光学纳米天线的谐振[J]. 光学精密工程, 2013,21(6): 1518-1523

YUAN Zong-heng SU Rui HUANG Jin. Resonance of Optical Nano-Antenna with Wider Resonant Areas[J]. Editorial Office of Optics and Precision Engineering, 2013,21(6): 1518-1523
袁纵横苏睿黄静. 宽谐振区的光学纳米天线的谐振[J]. 光学精密工程, 2013,21(6): 1518-1523 DOI： 10.3788/OPE.20132106.1518.

YUAN Zong-heng SU Rui HUANG Jin. Resonance of Optical Nano-Antenna with Wider Resonant Areas[J]. Editorial Office of Optics and Precision Engineering, 2013,21(6): 1518-1523 DOI： 10.3788/OPE.20132106.1518.

摘要

提出了一种有双谐振频率和较宽谐振区域的纳米天线结构。利用有限积分法，计算了由金构成的表面等离子体光学纳米天线的谐振特性，研究了在谐振区域内谐振频率和谐振电场随位置变化的情况。结果表明，在不同谐振频率下存在两个谐振电场，在中间区域，谐振频率为270 THz，在侧边间隙区，谐振频率为390 THz；激励源为1 V/m时，其谐振电场均达700 V/m以上，是普通偶极子天线的18倍；第一谐振区域的谐振场集中在10~25 nm，在此范围内，谐振电场较大、谐振频率几乎不变；加上折射率为1.5 的玻璃衬底后，天线的谐振电场达到800 V/m，与没有衬底时相比，谐振频率变化很小。研究的天线结构在高性能的光学纳米天线、太阳能电池和生物传感器方面有潜在的应用价值。

Abstract

A nano-antenna with two resonant frequencies and wider resonant areas was constructed. On the basis of the finite integral method

the resonant properties of the surface plasmon optical nano-antenna constructed by Au were calculated and the resonant frequencies and resonant fields in resonant areas were mainly simulated. The experiments show that there are two resonant areas in different resonant frequencies

which are 270 THz at the middle gap and 390 THz at the side gap. Their resonant electric fields are up to 700 V/m

which is about 18 times higher than that of the common dipole antenna when the excitation field is 1 V/m. The resonance field at the first resonant area is confined at the central part from 10 nm to 25 nm along the Z-axis direction

the resonant frequency is almost not changed and the magnitude is greater. The structure with a glass substrate of refraction index of 1.5 is also considered

the resonant field is up to 800 V/m

whereas the resonant center frequencies are almost not changed. The proposed structure has potential applications to high-quality optical antennas

solar cells

and biosensors.

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Keywords

references

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