An electro-optic modulator based on a low-refractive index polymer photonic crystal microcavity

Abstract

The invention discloses an electro-optical modulator based on a low-refractive-index polymer photonic crystal microcavity, which belongs to the technical field of optical communication. It includes a silicon dioxide substrate, a polymer waveguide, left and right symmetrical strip-shaped gold electrodes, and a silicon dioxide coating layer. A series of symmetrical elliptical holes are etched on the polymer waveguide to form a low refractive index polymer one-dimensional photonic crystal nanobeam microcavity; the elliptical holes are divided into a transition hole area and a mirror hole area; Input a wide-spectrum Gaussian light source on the end face, apply a voltage to the strip-shaped gold electrode on one side, and ground the voltage of the strip-shaped gold electrode on the other side; The intensity and phase of the incident light wave of the nanobeam microcavity change; finally, the spectrometer observes the change of the spectrum to complete a modulation process from the electrical signal to the optical signal. The invention has small size, easy waveguide integration, large modulation bandwidth and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of optical communication, in particular to an electro-optic modulator based on a low-refractive-index polymer photonic crystal microcavity. Background technique [0002] In modern information systems, almost all the information generated by humans and machines exists and propagates in the form of light at a certain stage. The optical Internet with light waves as the carrier and optical fiber as the transmission medium occupies a core position in the information Internet at all levels. As a result, integrated photonic waveguide devices have increasingly become a major technical research direction. [0003] On-chip electro-optic modulators are the core devices in modern optical communication systems, and have attracted extensive attention from researchers from all over the world. So far, various types of electro-optic modulators have been developed, such as waveguide type, Mach-Zehnder type, surface plasmon t...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the traditional silicon-based photonic crystal microcavity electro-optical modulators, which mostly use the carrier dispersion effect mechanism to modulate advanced signals, causing signal distortion and uncompact structure, which is not conducive to on-chip integration; Electro-optic modulator of refractive index polymer photonic crystal microcavity, simple and compact structure, easy on-chip integration, and can achieve excellent performance of high efficiency and large bandwidth

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