Research output: Contribution to journal › Article
Journal | Optics Express |
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Date | Accepted/In press - 31 Oct 2017 |
Date | E-pub ahead of print - 10 Nov 2017 |
Date | Published (current) - 27 Nov 2017 |
Issue number | 24 |
Volume | 25 |
Pages (from-to) | A1154-A1161 |
Early online date | 10/11/17 |
Original language | English |
Halide perovskite materials have rapidly emerged as outstanding optoelectronic materials for solar cells, light-emitting diodes (LEDs), and lasers. Compared to hybrid organic-inorganic perovskites, all-inorganic perovskites have shown unique merits that may contribute to the ultimate goal of developing electrically-pumped lasers. In this paper, we demonstrate a distributed feedback (DFB) resonator using an all-inorganic perovskite thin film as the gain medium. The film has a gain coefficient of 161.1 cm−1 and a loss coefficient of 30.9 cm−1. Excited by picosecond pulses, the microstructured all-inorganic perovskite film exhibits a single-mode emission at 654 nm with a threshold of 33 μJ/cm2. The facile fabrication process provides a promising route towards low-cost single-mode visible lasers for many practical applications.
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