Transmission-enhanced nanometer annular near-field optical probe and preparation method thereof

A technology of near-field optics and optical probes, which is applied in the field of optics and optoelectronics, can solve the problems of low light transmission and poor directionality of transmissive nanoprobes, and achieve high sensitivity and high spatial resolution.

Active Publication Date: 2018-10-02
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a nano-annular near-field optical probe with enhanced transmission and its preparation method, thereby solving the technical problems of low light transmission and poor directionality of the transmission nano-probe

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  • Transmission-enhanced nanometer annular near-field optical probe and preparation method thereof
  • Transmission-enhanced nanometer annular near-field optical probe and preparation method thereof
  • Transmission-enhanced nanometer annular near-field optical probe and preparation method thereof

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0034] In one aspect of the present invention, a nano-annular near-field optical probe with enhanced transmission is provided, including: an optical fiber core, a nano-annular structure, a metal film, and a central enhanced transmission hole;

[0035]The top of the tapered needle tip of the fiber core is the end face of the fiber core, and a nano-ring structure is etched on the end face of the f...

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Abstract

The invention discloses a transmission-enhanced nanometer annular near-field optical probe and a preparation method thereof. The probe is composed of an optical fiber core, nanometer annular structures, a metal film and a central enhancing transmission hole. The nanometer annular structures are distributed at an interface between silicon dioxide on the smooth end of the optical fiber core and themetal film and can convert excited light to plasmons which are focused to the central enhancing transmission hole, and furthermore a nanometer scale and enhanced transmission light with height directivity are generated. Furthermore through changing and optimized position and width of the annular structure, metal film material and thickness, dimension size of the central enhancing transmission holeand the like, regulation and optimization of nanometer focusing can be realized. The transmission-enhanced nanometer annular near-field optical probe can be used as the probe of a scanning near-fieldoptical microscope, an atomic force microscope and a tip-enhanced Raman spectrometer. High-directivity nanometer-scale enhanced transmission near-field light which is formed by the optical probe canbe used as a light source for nanometer lithography and sub-wavelength optical transmission. Furthermore the transmission-enhanced nanometer annular near-field optical probe has an important application value in many fields such as nano-sensing and nano-imaging.

Description

technical field [0001] The invention belongs to the field of optics and optoelectronic technology, and relates to micro-nano optical devices, surface plasmon excitation and nano-focusing, in particular to a nano-annular near-nano with enhanced transmission performance with high directivity, high spatial resolution and high sensitivity. Field optical probe and its preparation method. Background technique [0002] Due to the diffraction limit of light, traditional optical methods cannot gather light energy below the sub-wavelength scale, collect fine structure information, and cannot effectively transmit light through holes with a diameter of half a wavelength. Therefore, how to solve the above problems has become a key basic scientific and technical problem in the field of modern optics. In recent years, the development of photonics, plasmonics and nano-optics has made it possible to efficiently focus light energy to sub-wavelength dimensions and collect fine structure infor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01Q60/22G02B6/26G02B5/00
CPCG01Q60/22G02B5/008G02B6/262
Inventor 曾志豪王海卫谢长生李红云黄涛邹宇豪肖瑶
Owner HUAZHONG UNIV OF SCI & TECH
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