Metal nano conical spring device
A technology of metal nano and devices, which is applied in the field of optics and optoelectronics, can solve the problems of surface plasmon research and application limitations, complex processing, etc., and achieve the effect of manipulating and screening, and improving sensitivity
Active Publication Date: 2020-11-06
NANKAI UNIV
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Problems solved by technology
At present, there are a variety of metal structures that enhance nano-focusing, and the most commonly used one is the metal nano-cone structure. However, the focusing of the nano-cone structure has limitations and the processing is relatively complicated, which makes the research and application of surface plasmons difficult. limitation
Method used
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Embodiment 1
[0017] like figure 1 As shown, a metal nano-cone spring device that can generate a chiral light field is composed of a metal nano-cone spring. The equation of the structure in the cylindrical coordinate system is:
[0018]
[0019] where: ρ i (i=1, 2, 3, 4, 5) and θ are the radius and angle under the polar coordinate system respectively, a is the initial radius of the nano-spiral cone, b is the preset height coefficient, c is the reduced radius, etc. Poor, h is the height of the structure.
[0020] The manufacture of the metal nano-conical spring device in the present invention can be realized by chemical corrosion. Let's take the production of silver nano-cone spring as an example, the specific steps are as follows:
[0021] (1) Mix 30ml of sodium hydroxide solution with a concentration of 7mol / L and 1ml of copper nitrate solution with a concentration of 0.1mol / L, then pour the mixed solution into a 50ml polytetrafluoroethylene-lined reaction kettle, and then add 25μl ...
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Abstract
The invention discloses a metal nano conical spring device capable of generating a local super-chiral light field. The device is composed of a metal nano conical spring, and the radius of the spring is gradually reduced along with the rise of the height of the structure; when incident light irradiates the bottom surface of the metal nano conical spring device, the energy of the incident light is converted into surface plasmon, and the surface plasmon is propagated along the curved surface of a metal nano cone and is compressed to the top end to form highly locally enhanced electromagnetic field distribution, so that a strongly nano focused local superchiral light field is obtained; and by changing the wavelength and polarization state of incident light and the material structure parametersof the metal nano conical spring device, the intensity and chirality of the local super-chiral light field can be regulated and controlled. The metal nano conical spring device has an important application value for operation, screening and detection of chiral molecules and quantum encryption communication.
Description
technical field [0001] The invention belongs to the field of optics and photoelectric technology, and relates to a nano photoelectric device, a nano local focus and a vector field, in particular to a metal nano cone spring device capable of generating a chiral light field. Background technique [0002] Generating a chiral nanofocused optical field is crucial for improving single-molecule imaging, heat-assisted magnetic recording, nanolithography, and induced thermal electrons. At present, there are a variety of metal structures that enhance nano-focusing, and the most commonly used one is the metal nano-cone structure. However, the focusing of the nano-cone structure has limitations and the processing is relatively complicated, which makes the research and application of surface plasmons difficult. limitation. The metal nanocone spring structure is easy to process and has chiral characteristics, and a highly localized superchiral optical field can be formed at the spring ti...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F16F1/08G02B5/00
CPCF16F1/08G02B5/008
Inventor 匡登峰赵梦娴杨卓
Owner NANKAI UNIV