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Quantum dot microsphere laser levitated in the air
Nano Research 2024, 17(12): 10525-10528
Published: 14 June 2024
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Laser levitated in the air may open new application scenarios, such as quantum information processing, three-dimensional display, and ultra-sensitive gas sensing et al. However, the solid-state levitated laser is yet to be demonstrated. Here, we develop a nebulization method to fabricate colloidal quantum dots self-assembled microspheres, which can be levitated by photophoresis provided by continuous wave lasers and photoexcited by pulsed lasers. These levitated microspheres can serve as high-quality gain media and whispering gallery mode cavities simultaneously, allowing us to demonstrate the levitated solid-state laser for the first time.

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