High-heat-dissipation perovskite nanosheet laser and preparation method thereof

Abstract

The invention belongs to the technical field of laser design, and discloses a high-heat-dissipation perovskite nanosheet laser which comprises a heat conduction base, a silicon dioxide bonding layer is arranged on the heat conduction base, and a perovskite nanosheet is arranged on the silicon dioxide bonding layer to serve as a laser gain medium. A polyvinylidene fluoride encapsulation layer is arranged above the perovskite nanosheet, and the polyvinylidene fluoride encapsulation layer is used for encapsulating the perovskite nanosheet. According to the invention, the temperature of the device is greatly reduced through the heat-conducting base; the polyvinylidene fluoride layer has the physical properties of high temperature resistance and effective isolation of water / oxygen, and can improve the stability of the device. And secondly, the polyvinylidene fluoride packaging layer and the silicon dioxide layer serve as double-sided waveguides, so that the highest light limiting capability of the structure is ensured, the power consumption and the heat effect are reduced, and the thermal stability of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of laser design, and in particular relates to a high heat dissipation perovskite nanosheet laser, which improves the thermal stability of the laser device by improving the heat dissipation effect of the device. Background technique [0002] In recent years, perovskite, as an emerging semiconductor material, exhibits material properties such as higher optical gain, low defect state density and low Auger loss than traditional semiconductor materials. Therefore, perovskite-based micro-nano lasers exhibit lower lasing thresholds and non-radiative losses. Continuously realizing long-term stable operation of CW-injected perovskite micro-nano lasers is a key step towards the application of electrically pumped lasers and high-density optoelectronic integrated devices. As a high-quality resonant cavity, nanosheets can be mass-produced and miniaturized, which is more conducive to the development of optoelectronic int...

AI Technical Summary

Problems solved by technology

[0005] Importantly, direct introduction of high thermal conductivity substrates such as Si ( kappa ~130 W / (m K), n~3.43), SiC ( kappa ~490W / (m K), n~2.6), diamond ( kappa ~1800 W / (m K), n~2.42), due to its high refractive index, which leads to a large light field leakage in the nanosheet, making it impossible to form a resonance to generate laser light

And because the roughness of these materials is generally large, it will increase the scattering loss and the contact thermal resistance between the two materials, and the increase of the contact thermal resistance will aggravate the thermal effect in the device

[0006] At present, the temperature of perovskite laser devices rises sharply under high pump power density, and the combined action of water, oxygen and material surface defects will lead to thermal degradation of materials, which is the biggest challenge for the commercialization of perovskite laser devices

Images