Wavelength-Tunable Mid-Infrared Lasing from Black Phosphorus Nanosheets
Wavelength-Tunable Mid-Infrared Lasing from Black Phosphorus Nanosheets
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黑磷纳米片的波长可调谐中红外激光
DOI：
10.1002/adma.201808319
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Pan Anlian
中科院分区：
文献类型：
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作者：
Zhang Yushuang;Wang Shaowei;Chen Shula;Zhang Qinglin;Wang Xiao;Zhu Xiaoli;Zhang Xuehong;Xu Xing;Yang Tiefeng;He Mai;Yang Xin;Li Ziwei;Chen Xu;Wu Mingfei;Lu Yuerui;Ma Renmin;Lu Wei;Pan Anlian
货车瓦层状半导体材料具有独特的物理性质，在开发高性能电子和光子器件方面引起了极大的兴趣。其中，黑磷（BP）的独特之处在于其层数调谐的直接带隙，其范围从近红外（MIR）波段到中红外（MIR）波段。此外，褶皱的蜂巢晶格赋予材料高度线性偏振的发射和载流子传输的显著各向异性。这些独特的材料特性使BP成为构建中红外相干光源的有趣和有前途的构建块。在这里，报道了基于与分布式布拉格反射器腔耦合的单晶BP纳米片的室温表面发射MIR激光器。在3611 nm处实现MIR受激发射，具有接近统一的线性偏振，其在高达360 K的温度下表现出稳健的热稳定性。最重要的是，激光波长可以从3425到4068 nm通过改变腔长通过BP层的厚度控制调谐。所提出的器件方案在MIR光谱范围内的高度偏振激光输出和波长可调谐能力为偏振分辨IR成像、测距和自由空间量子通信中的广泛应用开辟了有希望的机会。
Van der Waals layered semiconductor materials own unique physical properties and have attracted intense interest in developing high‐performance electronic and photonic devices. Among them, black phosphorus (BP) is distinct for its layer number‐tuned direct band gap which spans from near‐ to mid‐infrared (MIR) waveband. In addition, the puckered honey comb crystal lattice endows the material with highly linear‐polarized emission and marked anisotropy in carrier transportation. These unique material properties render BP as an intriguing and promising building block for constructing mid‐infrared‐ranged coherent light sources. Here, a room temperature surface‐emitting MIR laser based on single crystalline BP nanosheets coupled with a distributed Bragg reflector cavity is reported. MIR stimulated emission at 3611 nm is achieved with a near‐unity linear polarization, which exhibits robust thermal stability up to 360 K. Most importantly, the lasing wavelength can be tuned from 3425 to 4068 nm by varying the cavity length via thickness control of BP layer. The demonstrated highly polarized lasing output and wavelength‐tunable capacity of the proposed device scheme in MIR spectral range opens up promising opportunities for a broad array of applications in polarization‐resolved IR imaging, range‐finding, and free space quantum communications.