Ultralow‐Threshold Continuous‐Wave Room‐Temperature Crystal‐Fiber/Nanoperovskite Hybrid Lasers for All‐Optical Photonic Integration. Issue 12 (11th February 2021)

• Record Type: Journal Article
• Authors: Nguyen, Duc Huy; Sun, Jia‐Yuan; Lo, Chia‐Yao; Liu, Jia‐Ming; Tsai, Wan‐Shao; Li, Ming‐Hung; Yang, Sin‐Jhang; Lin, Cheng‐Chia; Tzeng, Shien‐Der; Ma, Yuan‐Ron; Lin, Ming‐Yi; Lai, Chien‐Chih
• Is Part Of: Advanced materials. Volume 33:Issue 12(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-11
• Subjects: fibers -- hybrid lasers -- lead halide perovskites -- perovskite lasers -- thermal management; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202006819
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Continuous‐wave (CW) room‐temperature (RT) laser operation with low energy consumption is an ultimate goal for electrically driven lasers. A monolithically integrated perovskite laser in a chip‐level fiber scheme is ideal. However, because of the well‐recognized air and thermal instabilities of perovskites, laser action in a perovskite has mostly been limited to either pulsed or cryogenic‐temperature operations. Most CW laser operations at RT have had poor durability. Here, crystal fibers that have robust and high‐heat‐load nature are shown to be the key to enabling the first demonstration of ultralow‐threshold CW RT laser action in a compact, monolithic, and inexpensive crystal fiber/nanoperovskite hybrid architecture that is directly pumped with a 405 nm diode laser. Purcell‐enhanced light–matter coupling between the atomically smooth fiber microcavity and the perovskite nanocrystallites gain medium enables a high Q (≈1500) and a high β (0.31). This 762 nm laser outperforms previously reported structures with a record‐low threshold of 132 nW and an optical‐to‐optical slope conversion efficiency of 2.93%, and it delivers a stable output for CW and RT operation. These results represent a significant advancement toward monolithic all‐optical integration. Abstract : Purcell‐enhanced light–matter coupling between an atomically smooth fiber microcavity and perovskite gain nanocrystallites enables a high Q (≈1500) and a high β (0.31), outperforming previously reported structures with a 132 nW record‐low threshold. This is thought to be the first demonstration of monolithic integration of a perovskite laser into a compact and inexpensive fiber platform.