Apparatus capable of continuously adjusting plasmon formant

Abstract

The invention discloses an apparatus capable of continuously adjusting plasmon formant. The apparatus comprises a flexible substrate with a periodic structure and strips arranged on the flexible substrate in a periodic manner and provided with a surface plasmon resonance property, the period and the amplitude of the flexible substrate are changed through compression or stretching of the flexible substrate, the geometric shape of the strips and the effective dielectric constant of the environment thereof are changed, the adjustability of the plasmon formant is realized, the minimum repeating units of the shape of the cross section of the flexible substrate are sinusoid, triangle, trapezoid or semicircle, and the coverage of the strips is less than half period of the minimum repeating units of the flexible substrate. The beneficial effects of the apparatus are that the position of the plasmon formant can be continuously adjusted in a large range in a controllable manner.

Description

technical field [0001] The invention belongs to the field of metamaterials, and more specifically relates to a device capable of continuously adjusting plasmon resonance peaks. Background technique [0002] The continuous tunability of the plasmon resonance peak is of great significance to the fields of biosensing, optoelectronics and so on. In the existing literature, for traditional metal materials, it is mainly by changing the size and spacing of the prepared structure. The size itself will change the position of the resonance peak, and the spacing will affect the coupling between the structures, thereby affecting the position of the resonance peak. . For the material of graphene, its electrons are massless two-dimensional electrons. In addition to changing the size, spacing and number of layers of graphene nanostructures, it can also be adjusted by changing the Fermi level of graphene. Changing the size, spacing, and number of layers of graphene nanostructures can chan...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a device that can continuously adjust the plasmon resonant peak, the purpose of which is to realize the large-scale continuous controllable adjustment of the plasmonic resonant peak by utilizing the good mechanical properties of the flexible substrate ; Aim to solve the problem of small adjustment range of the plasmon resonance peak in the prior art

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