中国物理B ›› 2017, Vol. 26 ›› Issue (11): 114201-114201.doi: 10.1088/1674-1056/26/11/114201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Characteristics of photonic nanojets from two-layer dielectric hemisphere

Yunyue Liu(刘昀玥), Xianchao Liu(刘贤超), Ling Li(李玲), Weidong Chen(陈卫东), Yan Chen(陈艳), Yuerong Huang(黄跃容), Zhengwei Xie(谢征微)   

  1. 1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China;
    2. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology, Chengdu 610054, China
  • 收稿日期:2017-05-23 修回日期:2017-07-10 出版日期:2017-11-05 发布日期:2017-11-05
  • 基金资助:

    Project supported by State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences; Sichuan Provincial Department of Education, China (Grant No. 16ZA0047); the State Key Laboratory of Metastable Materials Science and Technology, Yansan University, China (Grant No. 201509); and the Large Precision Instruments Open Project Foundation of Sichuan Normal University, China (Grant Nos. DJ2015-57, DJ2015-58, DJ2015-60, DJ2016-58, and DJ2016-59).

Characteristics of photonic nanojets from two-layer dielectric hemisphere

Yunyue Liu(刘昀玥)1, Xianchao Liu(刘贤超)1,2, Ling Li(李玲)1, Weidong Chen(陈卫东)1, Yan Chen(陈艳)1, Yuerong Huang(黄跃容)1, Zhengwei Xie(谢征微)1   

  1. 1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China;
    2. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology, Chengdu 610054, China
  • Received:2017-05-23 Revised:2017-07-10 Online:2017-11-05 Published:2017-11-05
  • Contact: Zhengwei Xie E-mail:zzwxie@aliyun.com
  • Supported by:

    Project supported by State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences; Sichuan Provincial Department of Education, China (Grant No. 16ZA0047); the State Key Laboratory of Metastable Materials Science and Technology, Yansan University, China (Grant No. 201509); and the Large Precision Instruments Open Project Foundation of Sichuan Normal University, China (Grant Nos. DJ2015-57, DJ2015-58, DJ2015-60, DJ2016-58, and DJ2016-59).

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摘要：

The properties of the photonic nanojet generated by a two-layer dielectric microsphere are studied. Simulation results indicate that this novel structure can generate a photonic nanojet outside its volume when the refractive index contrast relative to the background medium is higher than 2:1 in the condition of plane wave incidence. When the refractive index is smaller than 2, we show that an ultralong nanojet generated by the two-layer hemisphere has an extension of 28.2 wavelengths, and compared with the homogeneous dielectric hemisphere, it has superior performance in jet length and focal distance. Its dependence on the configuration and refractive index is investigated numerically. According to the simulation of the two-layer dielectric microsphere, a photonic nanojet with a full width at half maximum (FWHM) less than 1/2 wavelength is obtained and the tunable behaviors of the photonic nanojet are demonstrated by changing the reflective indices of the material or radius contrast ratio.

关键词: photonic nanojet, hemisphere, micro-optics, subdiffraction

Abstract:

The properties of the photonic nanojet generated by a two-layer dielectric microsphere are studied. Simulation results indicate that this novel structure can generate a photonic nanojet outside its volume when the refractive index contrast relative to the background medium is higher than 2:1 in the condition of plane wave incidence. When the refractive index is smaller than 2, we show that an ultralong nanojet generated by the two-layer hemisphere has an extension of 28.2 wavelengths, and compared with the homogeneous dielectric hemisphere, it has superior performance in jet length and focal distance. Its dependence on the configuration and refractive index is investigated numerically. According to the simulation of the two-layer dielectric microsphere, a photonic nanojet with a full width at half maximum (FWHM) less than 1/2 wavelength is obtained and the tunable behaviors of the photonic nanojet are demonstrated by changing the reflective indices of the material or radius contrast ratio.

Key words: photonic nanojet, hemisphere, micro-optics, subdiffraction

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
42.50.St (Nonclassical interferometry, subwavelength lithography) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)