Flexible transfer method of photonic crystal or micro/nano grating structure on end surface of optical fiber

A technology of photonic crystal and grating structure, applied in cladding optical fiber, optical waveguide, light guide, light guide, etc., can solve the problem of small size of the end face of the optical fiber, achieve probe-based, precise control and skills, miniaturization and integration Effect

Active Publication Date: 2015-07-29
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, as the optical fiber is used as the substrate for structural preparation, the size of the end face of the optical fiber is small, the contradiction between the characteristics of the optica

Method used

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  • Flexible transfer method of photonic crystal or micro/nano grating structure on end surface of optical fiber
  • Flexible transfer method of photonic crystal or micro/nano grating structure on end surface of optical fiber
  • Flexible transfer method of photonic crystal or micro/nano grating structure on end surface of optical fiber

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Effect test

example 1

[0043] Example 1: Stripping transfer of photonic crystals on fiber end faces.

[0044] (1) Use interference lithography to create a surface with an area of ​​10×10mm 2 A photoresist grating structure with a period of 500 nm was prepared on the surface of the ITO glass. The interference lithography uses a He-Cd laser with an output wavelength of 325nm as the ultraviolet light source, and S1805 photoresist as the recording medium. S1805 is spin-coated on the surface of ITO glass at a speed of 2000 revolutions per second, and its thickness is about 500nm. See image 3 (a).

[0045] (2) Control the exposure and development time so that the modulation depth of the photoresist grating is about 300nm. See image 3 (b).

[0046] (3) Soak the photoresist grating sample in 20% hydrochloric acid for 60 minutes. See image 3 (c).

[0047](4) The ITO film is completely dissolved, and the photoresist grating is separated from the substrate and floats on the surface of the hydrochlo...

example 2

[0051] Example 2: Welding transfer of metal photonic crystals on the end face of optical fiber.

[0052] (1) obtain photoresist grating ( Figure 4 (a) Colloidal solution of chemically synthesized gold nanoparticles in toluene was spin-coated at a concentration of 100 mg / ml. See Figure 4 (b).

[0053] (2) The sample was heated in a muffle furnace at 300° C. for 20 minutes, and then naturally cooled to room temperature to obtain a metal photonic crystal with a period of 500 nm. See Figure 4 (c).

[0054] (3) An optical fiber with a core diameter of 400 μm is fixed above the metal photonic crystal, so that the end face of the optical fiber is in natural contact with the upper surface of the metal photonic crystal. See Figure 4 (d).

[0055] (4) Drop a small amount of PMMA chloroform solution at the contact point between the optical fiber and the metal photonic crystal, with a concentration of 15 mg / ml. Stand still in the fume hood for 100 minutes to fully evaporate th...

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Abstract

A flexible transfer method of a photonic crystal or micro/nano grating structure on the end surface of an optical fiber belongs to the technical field of nano photonic materials and devices. The method comprises preparing a metal or dielectric material photonic crystal or micro/nano grating structure on a large-area flat substrate coated with metal oxide films; performing transfer of photonic crystal onto the end surface of the optical fiber through two different processes including stripping transfer and welding transfer; during the stripping transfer, stripping the photonic crystal from the large-area flat substrate and directly adhering the photonic crystal onto the end surface of the optical fiber; during the welding transfer, fixing the optical fiber onto the surface of the large-area photonic crystal prepared on the surface of the flat substrate, connecting the optical fiber at a contact point through flexible materials, performing a buffer layer erosion process to strip the photonic crystal from the large-area flat substrate, and then transferring the photonic crystal onto the end surface of the optical fiber. The flexible transfer method of the photonic crystal or micro/nano grating structure on the end surface of the optical fiber achieves a success rate of 100% and is a lossless transfer method.

Description

technical field [0001] The invention belongs to the technical field of nanometer photonic materials and devices. The method realizes the transfer printing of the large-area dielectric / metal material photonic crystal prepared on the flat substrate on the end face of the optical fiber. Background technique [0002] "Lab-on-Fiber" technology is an important content and development trend in the field of nanophotonics and its applications. The preparation of nanophotonic structures with different structural forms, different scales, and different materials on the fiber end face is the premise and core content of related research and device development. In particular, the integration of nanophotonic structures with fiber endfaces creates an advantageous avenue for the development of probe-based sensors. [0003] Although the nano-patterning of fiber end faces has stimulated many research interests and new nano-fabrication methods, these methods basically use the fiber end face of...

Claims

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/0229
Inventor 张新平
Owner BEIJING UNIV OF TECH
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