Non-volatile echo wall mode all-optical switch based on Ge2Sb2Te5 phase change material and manufacturing method thereof

Abstract

The invention provides a non-volatile echo wall mode all-optical switch based on a Ge2Sb2Te5 phase change material and a preparation method thereof. The preparation method comprises the following steps that S1, an echo wall mode initial optical fiber microsphere resonant cavity with the diameter of 125 [mu] m is prepared by using a standard single-mode optical fiber; S2, a Ge2Sb2Te5 phase change material with the thickness of 50 nm + / -1 nm is sputtered on the optical fiber microspheres through a magnetron sputtering system, and a Ge2Sb2Te5 functionalized microsphere resonant cavity is prepared; and S3, the optical fiber probe guides 532nm pulse laser with different powers and a constant pulse number to carry out optical switch modulation on the Ge2Sb2Te5 functionalized microsphere resonant cavity. According to the invention, by means of the advantages of small size and easy integration of the optical fiber, cascade and integration of the material echo wall mode optical fiber microspheres based on the GST phase change material can be realized, collaborative regulation and control of multiple all-optical switches are realized, and an all-optical network switch system is constructed.

Description

technical field [0001] The invention belongs to the technical field of optical control, in particular to a Ge 2 Sb 2 Te 5 Non-volatile whispering gallery mode all-optical switch of phase change material and manufacturing method thereof. Background technique [0002] In the past decade, the phase change material Ge 2 Sb 2 Te 5 Owing to the tunability of its phase state change, it shows great potential in the field of nonvolatile photonic integration applications. An attractive functional feature of these materials is their high optical property contrast between their crystalline and amorphous states. Ge 2 Sb 2 Te 5 can reversibly switch between a covalently bonded amorphous phase and a resonantly bonded crystalline phase, with up to 10 15 The high cyclability of a conversion cycle and the ability to preserve data integrity for several years do not require any external power supply. Furthermore, by carefully controlling the energy of the excitation signal, a variety...

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Problems solved by technology

Although this bias power is negligible in theory, it still has a large energy consumption in some practical routing schemes (such as packet switching)

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