Large-angle optical toning device and method based on disordered metal cylinder array
A technology of metal cylinders and toning devices, which is applied in the field of optical filters, can solve problems such as angle correlation problems that have not been solved well, and achieve good application prospects, angle insensitivity, and simple structure.
Active Publication Date: 2017-04-26
ZHEJIANG UNIV
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Problems solved by technology
The angular correlation problem introduced by this periodic structural color has not been well resolved
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[0024] In the following, the preparation and polarization and angle correlations of the disordered silver cylindrical structure filters with diameters of 76nm, 96nm, 106nm and 166nm are carried out.
[0025] In this example, a series of color filters based on disordered metal cylinder arrays with different diameters were prepared, image 3 The transmittance curves of three color filters with cylindrical diameters of 76nm, 96nm, and 166nm are shown. It can be seen from the figure that the highest transmittance can reach about 70%~80%. By changing the diameter of the cylinder from 76nm to 166nm, the The lowest point of the transmission spectrum is tuned from 495nm to 644nm, covering most of the visible light range; for the three color filters with cylindrical diameters of 76nm, 96nm, and 166nm, the two different polarization states of the incident light (the polarization directions are perpendicular to each other) ) compared their transmittance curves, given by Figure 4 It can...
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The invention discloses a disordered metallic cylinder array-based large-angle optical color modulation device and method. The device includes a white light source, a first collimating lens, a polarizing sheet, a glass substrate, a cylinder array, a second collimating lens, a focusing lens, a single-mode optical fiber and a spectrometer; the cylinder array is arranged on the glass substrate; the polarizing sheet, the first collimating lens and the white light source are sequentially arranged below the glass substrate; and the second collimating lens, the focusing lens, the single-mode optical fiber and the spectrometer are sequentially arranged above the glass substrate. Local surface plasma resonance effects formed in individual cylinders are utilized, so that the absorption of incident light at a certain wavelength can be enhanced, and the transmittance of transmission light at a corresponding wavelength can be inhibited, and therefore, color modulation can be realized. The device of the invention has the advantages of simple structure, small size, easiness in integration, high-temperature radiation resistance, independence from incident light polarization, insensitivity to angles, and the like, and has a bright application prospect in integrated digital display, projection and imaging devices and biomedical detection devices in the future.
Description
technical field [0001] The invention belongs to the field of optical filters, and in particular relates to a large-angle optical toning device based on a disordered metal cylinder array and a method thereof. Background technique [0002] In recent years, in order to overcome the shortcomings of traditional organic dyes or chemical pigment color filters such as corrosion resistance, high temperature resistance, poor radiation resistance, complex integration process and high cost, color filters based on surface plasmons have attracted extensive research. Surface plasmon based color filters can overcome the above-mentioned shortcomings of traditional color filters due to their structural and material properties. However, to achieve practical alternative applications, there are still problems such as transmittance, polarization dependence, angle dependence, integration Faced with size and other issues that need to be addressed. [0003] In the published patents and literatures,...
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IPC IPC(8): G02B5/20G02B27/28
CPCG02B27/28
Inventor 张冬仙叶鸣蒋潇婷孙理斌胡晓琳史斌吴青峻蒋建中
Owner ZHEJIANG UNIV