Electric pumped laser based on manganese-doped quantum dots and preparation method thereof

By introducing manganese doped ions into the quantum dot optical gain material and covering the ZnS shell to form a CdS:Mn/ZnS core-shell quantum dot, the problem of insufficient performance of electric pump lasers in the prior art is solved, and an electric pump laser with zero threshold light gain and high emission intensity is realized.

CN114759434BActive Publication Date: 2025-03-25WUXI LINEAR INTEGRATED SEMICON TECH CO LTD
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Patent Information

Application Number
CN202210420487.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-04-20
Publication Date
2025-03-25
Estimated Expiration
2042-04-20

AI Technical Summary

Technical Problem

The prior art is difficult to prepare high-performance electric pump lasers, which are mainly due to the high optical gain threshold and short life of quantum dots, which limit their application in electric pump excitation emission.

Method used

The electropump laser structure formed by adsorbing Mn2+ ions on the surface of the CdS core and covering the ZnS shell is used as the optical gain material. The electric pump laser structure formed includes a light-transmitting substrate, a distributed feedback grating layer, a conductive injection layer and a manganese doped quantum dot layer.

Benefits of technology

It achieves zero threshold optical gain and high emission intensity, the single exciton life reaches the order of milliseconds, and the gain relaxation is much slower than the electric pump rate and laser establishment time, supporting electric pump laser emission.

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Abstract

The present invention provides an electrically pumped laser based on manganese-doped quantum dots and a preparation method thereof. The electrically pumped laser comprises a light-transmitting substrate, a distributed feedback grating layer, a first conductive injection layer, a CdS:Mn / ZnS core-shell quantum dot layer, a second conductive injection layer and a reflective electrode layer; wherein the CdS:Mn / ZnS core-shell quantum dot layer is used as an optical gain medium. 2+ Ionic 6 A 1 State to 4 T 1 There is no absorption transition in the state, so the quantum dot is 2+ The emission wavelength of the ion only has emission but no absorption. The energy of emission comes from the transfer of edge states of CdS core band. 2+ The emission of ions can achieve zero-threshold optical gain, so that a zero-threshold and high-emission-intensity electrically pumped laser can be obtained based on CdS:Mn / ZnS core-shell quantum dots combined with a device structure.
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