典型文献
Superior optical Kerr effects induced by two-dimensional excitons
文献摘要：
Materials with strong optical Kerr effects(OKEs)are crucial for a broad range of applications,such as all-optical data processing and quantum information.However,the underlying OKE mechanism is not clear in 2D materials.Here,we reveal key insights of the OKE associated with 2D excitons.An admirably succinct formalism is derived for predicting the spectra and the magnitude of the nonlinear refractive index(n2)of 2D materials.The predicted n2 spectra are consistent with reported experimental data and exhibit pronounced excitonic resonances,which is distinctively different from bulk semiconductors.The n2 value is predicted to be 3×10-10 cm2/W for a 2D layered perovskite at low temperature as 7 K,which is four orders of magnitude larger than those of bulk semi-conductors.The superior OKE induced by 2D excitons would give rise to a narrow refractive index-near-zero region for intense laser light.Furthermore,we demonstrate that the 2D layered perovskite should exhibit the best OKE efficiency(WFOM=1.02,TFOM=0.14)at 1550 nm,meeting the material requirements for all-optical switching.Our findings deepen the understanding of the OKE of 2D semiconducting materials and pave the way for highly efficient all-optical excitonic devices.
文献关键词：
中图分类号：
作者姓名：
FENG ZHOU;CACERE JELAH NIEVA;DIANYUAN FAN;SHUNBIN LU;WEI JI
作者机构：
SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology,International Collaborative Laboratory of 2D Materials for Optoelectronic Science&Technology of Ministry of Education,Institute of Microscale Optoelectronics(IMO),Shenzhen University,Shenzhen 518060,China;Department of Physics,National University of Singapore,Singapore 117542,Singapore
文献出处：
引用格式：
[1]FENG ZHOU;CACERE JELAH NIEVA;DIANYUAN FAN;SHUNBIN LU;WEI JI-.Superior optical Kerr effects induced by two-dimensional excitons)[J].光子学研究（英文）,2022(03):834-842
A类：
OKEs,OKE,admirably,WFOM,TFOM
B类：
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AB值：
0.531122
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