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Wavelength-Tunable Mid-Infrared Lasing from Black Phosphorus Nanosheets.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-03-11 , DOI: 10.1002/adma.201808319
Yushuang Zhang 1 , Shaowei Wang 2 , Shula Chen 1 , Qinglin Zhang 3 , Xiao Wang 3 , Xiaoli Zhu 3 , Xuehong Zhang 3 , Xing Xu 3 , Tiefeng Yang 3 , Mai He 3 , Xin Yang 1 , Ziwei Li 1 , Xu Chen 2 , Mingfei Wu 2 , Yuerui Lu 4 , Renmin Ma 5 , Wei Lu 2 , Anlian Pan 1
Affiliation  

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.

中文翻译:

黑色磷纳米片的波长可调的中红外激光发射。

范德华层状半导体材料拥有独特的物理性能,并且在开发高性能电子和光子器件方面引起了浓厚的兴趣。其中,黑磷(BP)的独特之处在于其层数可调的直接带隙,范围从近红外到中红外(MIR)波段。此外,起皱的蜂蜜梳状晶格使材料具有高度线性极化的发射,并在载流子传输中具有明显的各向异性。这些独特的材料特性使BP成为构建中红外范围相干光源的有趣且有前途的构建基块。在此,报道了基于单晶BP纳米片并与分布式布拉格反射器腔耦合的室温表面发射MIR激光器。通过近统一的线性偏振实现了3611 nm的MIR激发发射,该偏振在高达360 K的温度下表现出强大的热稳定性。最重要的是,可以通过改变厚度来控制BP的腔长,从而将激光波长从3425 nm调整到4068 nm层。拟议中的器件方案在MIR光谱范围内表现出的高偏振激光输出和波长可调能力,为偏振分辨IR成像,测距和自由空间量子通信中的各种应用打开了广阔的前景。
更新日期:2020-04-21
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