Low-loss conical field local enhancement device with groove

A conical, low-loss technology, applied in the direction of instruments, optical components, optics, etc., can solve the problems that cannot meet the excitation polarization requirements of SPPs well, achieve photon integration, break through the limitations of polarization states, and be easy to design Effect

Active Publication Date: 2018-12-11
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Radially polarized light can effectively improve the excitation efficiency of SPPs and further localize and enhance through the metal tip, while linearly polarized light cannot well meet the excitation polarization requirements of SPPs

Method used

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  • Low-loss conical field local enhancement device with groove
  • Low-loss conical field local enhancement device with groove
  • Low-loss conical field local enhancement device with groove

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Embodiment Construction

[0028] Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

[0029] The invention discloses a low-loss conical field local enhancement device with grooves. The field local enhancement device can locally concentrate and amplify energy on the nanometer scale and locally enhance the field on a limited space scale. It can be used specifically for High integration density photonic integrated circuits, high resolution imaging, particle manipulation and optical data storage and many other technical fields.

[0030] like figure 1 As shown, the field local enhancement device includes a four-layer structure, namely a f...

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Abstract

The invention reveals a low-loss conical field local enhancement device with a groove, and the local enhancement device comprises four structures: a first structure, a second structure, a third structure and a fourth structure, wherein the first, second, third and fourth structures sequentially form a coaxial conical structure from the inside to the outside. The coaxial conical structure comprisestwo parts: an upper half part with an annular groove on the surface, and a lower half part with the smooth surface. The height of the upper half part and the height of the lower half part are each the half of the height of the cone, and the position at the half of the height of the cone is provided with a periodic annular groove with the depth of d, the period of L and the duty ratio of 5: 12 inan upward manner along an external inclined surface of the fourth structure. The device is compact and simple in structure, and the structure is easy to design. The material is easy to obtain, and thepreparation is easy to implement. The device facilitates the integration of photons, so the device can be used for the super-resolution imaging, single molecule detection, optical data storage, micro-nano sensing detection and near field optics.

Description

technical field [0001] The invention relates to a low-loss conical field local enhancement device with grooves, which can be used in many technical fields such as super-resolution imaging, single-molecule detection, optical data storage, micro-nano sensing detection, and near-field optics. Background technique [0002] With the rapid development of nano-optics, the nano-optical devices have become the focus of many scholars' research. As the size and spatial distance of nano-optical devices are constantly shrinking, technical difficulties will be encountered when designing nanoscale with special shapes and sizes-the transfer and concentration of light fields on the nanoscale (nano-focusing). Because the wavelength of light is on the microscale, many orders of magnitude too large, which limits the development of nano-optical devices, for example: tapered optical fibers or focusing on metal tips will cause huge losses, only a very small part of the excitation energy is transfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00
CPCG02B5/008
Inventor 李康许吉时楠楠谭朝幻杨茜孙钰淇刘杨梅陆云清
Owner NANJING UNIV OF POSTS & TELECOMM
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