Amplified Spontaneous Emission from Perovskite Quantum Dots Inside a Transparent Glass

The diverse optoelectronics systems can provide interesting design inspiration for photonics devices, ranging from optical modulators to light-emitting displays. With the increasing applications and requirements of optical interconnect in complex environments, an essential operation is increasingly being pursued to exploit the consolidation of various merits of basic components. Here, an optical gain from monodisperse CsPbBr3 quantum dots crystallized in a selected transparent glass is revealed. The threshold of amplified spontaneous emission increases from 7.4 to 100.4 mu J cm(-2) with the temperature from 78 K to room temperature, accompanied with a high gain coefficient of 627.9 cm(-1). A small fluctuation of the lifetime (approximate to 10.5%) with temperature and the photostability (>12 h) with the excitation of femtosecond laser indicates the robustness of the crystallized CsPbBr3 quantum dots in the transparent glass. These demonstrations present a deep understanding of the optical gain in the composite of metal halide perovskites and transparent glass and pave a path for the potential applications of CsPbBr3-based glass-ceramics as a gain medium for coherent light sources including laser/incoherent diode, fiber laser as well as optical amplifier chips.

Automated summary

The study reveals the optical gain characteristics of monodisperse CsPbBr3 quantum dots crystallized in transparent glass. By controlling the temperature, the threshold of amplified spontaneous emission can be changed with a high gain coefficient. The crystallized CsPbBr3 quantum dots in the transparent glass exhibit good stability with small fluctuations in lifetime and long photostability. These findings pave the way for the potential applications of CsPbBr3-based glass-ceramics in light sources and optical amplifiers.