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Few‐Layer Tin Sulfide: A Promising Black‐Phosphorus‐Analogue 2D Material with Exceptionally Large Nonlinear Optical Response, High Stability, and Applications in All‐Optical Switching and Wavelength Conversion
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-19 , DOI: 10.1002/adom.201700985 Leiming Wu 1, 2 , Zhongjian Xie 1 , Lu Lu 1 , Jinlai Zhao 1, 2 , Yunzheng Wang 1 , Xiantao Jiang 1 , Yanqi Ge 1 , Feng Zhang 1, 3 , Shunbin Lu 1 , Zhinan Guo 1 , Jie Liu 4 , Yuanjiang Xiang 1 , Shixiang Xu 3 , Jianqing Li 2 , Dianyuan Fan 1 , Han Zhang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-19 , DOI: 10.1002/adom.201700985 Leiming Wu 1, 2 , Zhongjian Xie 1 , Lu Lu 1 , Jinlai Zhao 1, 2 , Yunzheng Wang 1 , Xiantao Jiang 1 , Yanqi Ge 1 , Feng Zhang 1, 3 , Shunbin Lu 1 , Zhinan Guo 1 , Jie Liu 4 , Yuanjiang Xiang 1 , Shixiang Xu 3 , Jianqing Li 2 , Dianyuan Fan 1 , Han Zhang 1
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As an analogue compound of black phosphorus, a new 2D semiconducting few‐layer SnS is successfully synthesized, and its nonlinear optical response is investigated. It is shown that its nonlinear refractive index and third‐order nonlinear susceptibility are measured as n2 ≈ 10−5 (cm2 W−1) and 
≈ 10−10 (e.s.u.), respectively. By taking advantage of such a large Kerr nonlinearity, an all‐optical switching technique based on few‐layer SnS is realized through modulating the propagation of the signal beam by another controlling beam. The achievement of all‐optical switching indicates that few‐layer SnS could be developed as an excellent optical material for all‐optical signal processing. More importantly, a conceptually new and reliable information conversion system based on spatial cross‐phase modulation in few‐layer SnS, that is, the transmission and conversion of a sequence of bit information from one wavelength channel to the other, is presented. The contributions reveal potential applications of few‐layer SnS as a new type of optical information material, and it is therefore anticipated that SnS and other IV–VI compound‐based 2D nanomaterials could find promising applications in photonic devices such as optical modulators, optical switches, detectors, etc.
中文翻译：
少层硫化锡：一种很有前途的黑磷模拟2D材料，具有异常大的非线性光学响应，高稳定性，并在全光开关和波长转换中的应用
作为黑磷的类似化合物，成功地合成了一种新型的二维半导体层SnS，并研究了其非线性光学响应。结果表明，它的非线性折射率和三阶非线性极化率作为测量ñ 2 ≈10 -5（厘米2 w ^ -1）和≈10 -10（esu）。利用如此大的Kerr非线性，通过另一控制光束调制信号光束的传播，实现了基于少层SnS的全光开关技术。全光交换的成就表明，很少层的SnS可以发展成为用于全光信号处理的出色光学材料。更重要的是，提出了一种基于概念的新型可靠的信息转换系统，该系统基于几层SnS中的空间交叉相位调制，即，一系列比特信息从一个波长通道到另一个波长通道的传输和转换。这些贡献揭示了多层SnS作为新型光学信息材料的潜在应用，
更新日期：2017-12-19
≈ 10−10 (e.s.u.), respectively. By taking advantage of such a large Kerr nonlinearity, an all‐optical switching technique based on few‐layer SnS is realized through modulating the propagation of the signal beam by another controlling beam. The achievement of all‐optical switching indicates that few‐layer SnS could be developed as an excellent optical material for all‐optical signal processing. More importantly, a conceptually new and reliable information conversion system based on spatial cross‐phase modulation in few‐layer SnS, that is, the transmission and conversion of a sequence of bit information from one wavelength channel to the other, is presented. The contributions reveal potential applications of few‐layer SnS as a new type of optical information material, and it is therefore anticipated that SnS and other IV–VI compound‐based 2D nanomaterials could find promising applications in photonic devices such as optical modulators, optical switches, detectors, etc.
中文翻译：
少层硫化锡：一种很有前途的黑磷模拟2D材料，具有异常大的非线性光学响应，高稳定性，并在全光开关和波长转换中的应用
作为黑磷的类似化合物，成功地合成了一种新型的二维半导体层SnS，并研究了其非线性光学响应。结果表明，它的非线性折射率和三阶非线性极化率作为测量ñ 2 ≈10 -5（厘米2 w ^ -1）和
≈10 -10（esu）。利用如此大的Kerr非线性，通过另一控制光束调制信号光束的传播，实现了基于少层SnS的全光开关技术。全光交换的成就表明，很少层的SnS可以发展成为用于全光信号处理的出色光学材料。更重要的是，提出了一种基于概念的新型可靠的信息转换系统，该系统基于几层SnS中的空间交叉相位调制，即，一系列比特信息从一个波长通道到另一个波长通道的传输和转换。这些贡献揭示了多层SnS作为新型光学信息材料的潜在应用，
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