Method for producing two-dimensional polymer photon crystal using flexible offset printing

Abstract

The method comprises: making a baseboard with an triangle cavity structure; making a PDMS template and transferring pattern; the obtained handkerchief polymer photon crystal is a trigonal system, and its air cavity diameter is 300nm, and its lattice constant is 600nm; the average depth of the air cavity is 375nm, and the aspect ratio is 1.25(375 / 300); the depth difference between the baseboard and mould pattern is only 3%; the refractive index of the background polymer at 1550nm is 1.475.

Description

technical field [0001] The invention relates to a method for making a two-dimensional photonic crystal, in particular to a two-dimensional polymer photonic crystal with a triangular crystal structure with an aspect ratio greater than 1 and a body size smaller than 500 nm by using a soft lithographic printing technology. Background technique [0002] Nanophotonics has a revolutionary impact on the prospects of photonics technology. Nanostructure-based photonic crystals play an important role in the fabrication of next-generation photonic devices. Photonic crystal is an artificial periodic dielectric structure. The functional devices made with them not only have greatly reduced size but also have excellent characteristics, such as high wavelength and angle sensitivity, large group velocity dispersion. Recently, devices based on two-dimensional photonic crystal thin plates have attracted widespread attention, such as two-dimensional flat photonic structures that can be compar...

AI Technical Summary

Problems solved by technology

However, replicating structures with aspect ratios larger than 1 and feature sizes smaller than 500 nm remains a challenge, partly due to the low modulus of PDMS templates.

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