The light source, optical waveguide and light enhancement of nano-integrated optical circuit

Liu Dan; Ma Ren-Min; Wang Fei-Fei; Zhang Zeng-Xing; Zhang Zhen-Sheng; Zhang Xue-Jin; Wang Xiao; Bai Yong-Qiang; Zhu Xing; Dai Lun; Zhang Bei

doi:10.7498/aps.57.371

Abstract
Scanning near-field microscopy (SNOM) was used to investigate the low-dimensional semiconductor fluorescence divices, which can work as micro-nano-light source, nano-optical waveguide and light enhancement component in nano-integrated optical circuit. It was found that the quality of semiconductor wire end emission was mainly determined by the sample radius. By designing the wire radius and topography reasonably, it can be used as the light source and optical waveguide in nano-integrated optical circuit. ZnO tetrapod, comb, and CdS multi-branch nano-ribbon also presented quite good adequacy for optical waveguide application, which can function well in light division, congregation, coupling and filtering. 2-D photonic crystal can enhance the light intensity of GaN based LED by as large as 5.2 times. About 30% fluorescence is confined to the surface of photonic crystal. This conclusion is helpful for the optimization of LED light emission. When the resonance excitation condition is fulfilled, Surface plasmm polaritons (SPP) will be excited at the interface between the semiconductor and the silver thin film, which will bring about strong enhancement of electromagnetic field at the interface. Photonic crystal and SPP can realize light enhancement under low_dimensional and nano-scale conditions. The experimental results show that both of them have the potential application as enhancement components in nano-integrated optical circuit.

Keywords:
nano-integrated optical circuit /

scanning near-field optical microscopy /

optical waveguide /

light enhancement
Authors and contacts
Liu Dan¹,

Ma Ren-Min¹,

Wang Fei-Fei³,

Zhang Zeng-Xing³,

Zhang Zhen-Sheng¹,

Zhang Xue-Jin¹,

Wang Xiao¹,

Bai Yong-Qiang¹,

Zhu Xing²,

Dai Lun¹,

Zhang Bei¹

(1)北京大学物理学院,人工微结构与介观物理国家重点实验室,北京 100871; (2)北京大学物理学院,人工微结构与介观物理国家重点实验室,北京 100871；国家纳米科学中心,北京 100080; (3)中国科学院物理研究所,北京 100080
References

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Vol. 57, Issue 1 - 2008-01-05

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