Negative and Positive Impact of Roughness and Loss on Subwavelength Imaging for Superlens Structures

CORC > 光电技术研究所 > 中国科学院光电技术研究所 > 微细加工光学技术国家重点实验室（开放室）

	Negative and Positive Impact of Roughness and Loss on Subwavelength Imaging for Superlens Structures
	Guo, Zhen ; Huang, Qizhao ; Wang, Changtao ; Gao, Ping ; Zhang, Wei ; Zhao, Zeyu ; Yan, Lianshan ; Luo, Xiangang
刊名	PLASMONICS
	2014
卷号	9 期号:1 页码:103-110
ISSN号	1557-1955
通讯作者	Luo, XG (reprint author), Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, POB 350, Chengdu 610209, Peoples R China.
中文摘要	We study on the negative and positive effect of surface roughness and loss coefficient on subwavelength imaging of the superlens structure. It has been found that even though surface roughness enables more transmission of high spatial frequency components, the random interferential noise between neighborhood images becomes more severe with increasing distortion. We show that additional loss is able to restrain the interferential noise caused by random roughness while preserving the imaging integrity. The results with practical parameters prove that the mean contrast and uniformity are improved by adding adequate loss on rough surface. Moreover, other two situations are further studied: (a) a single superlens with roughness on different interfaces and (b) a multilayered alternated metal-dielectric superlens with roughness on each surface. We found that the roughness on the imaging surface (metal-photoresist interface) plays a major role in determining the superlens imaging. The multilayer superlens is able to enhance the subwavelength imaging with fractionalized thinner films. But with the further fractionizing layers, the multilayer becomes more vulnerable to the roughness due to the multiple mixing and distorting. We still prove that additional loss is able to improve the performance in both situations.
英文摘要	We study on the negative and positive effect of surface roughness and loss coefficient on subwavelength imaging of the superlens structure. It has been found that even though surface roughness enables more transmission of high spatial frequency components, the random interferential noise between neighborhood images becomes more severe with increasing distortion. We show that additional loss is able to restrain the interferential noise caused by random roughness while preserving the imaging integrity. The results with practical parameters prove that the mean contrast and uniformity are improved by adding adequate loss on rough surface. Moreover, other two situations are further studied: (a) a single superlens with roughness on different interfaces and (b) a multilayered alternated metal-dielectric superlens with roughness on each surface. We found that the roughness on the imaging surface (metal-photoresist interface) plays a major role in determining the superlens imaging. The multilayer superlens is able to enhance the subwavelength imaging with fractionalized thinner films. But with the further fractionizing layers, the multilayer becomes more vulnerable to the roughness due to the multiple mixing and distorting. We still prove that additional loss is able to improve the performance in both situations.
学科主题	Subwavelength structures; Surface roughness; Loss; Multilayer
收录类别	SCI
语种	英语
WOS记录号	WOS:000330995700012
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/6845]
专题	光电技术研究所_微细加工光学技术国家重点实验室（开放室）
作者单位	1.[Guo, Zhen 2.Yan, Lianshan] Southwest Jiaotong Univ, Ctr Informat Photon Commun, Chengdu 610031, Peoples R China 3.[Guo, Zhen 4.Huang, Qizhao 5.Wang, Changtao 6.Gao, Ping 7.Zhang, Wei 8.Zhao, Zeyu 9.Luo, Xiangang] Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China 10.[Huang, Qizhao] Univ Elect & Sci Technol China, Sch Mechatron Engn, Chengdu 611731, Peoples R China
推荐引用方式 GB/T 7714	Guo, Zhen,Huang, Qizhao,Wang, Changtao,et al. Negative and Positive Impact of Roughness and Loss on Subwavelength Imaging for Superlens Structures[J]. PLASMONICS,2014,9(1):103-110.
APA	Guo, Zhen.,Huang, Qizhao.,Wang, Changtao.,Gao, Ping.,Zhang, Wei.,...&Luo, Xiangang.(2014).Negative and Positive Impact of Roughness and Loss on Subwavelength Imaging for Superlens Structures.PLASMONICS,9(1),103-110.
MLA	Guo, Zhen,et al."Negative and Positive Impact of Roughness and Loss on Subwavelength Imaging for Superlens Structures".PLASMONICS 9.1(2014):103-110.