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Physics Express 2011, 1: 10
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Research Article
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Ultrasmall optical beam splitters assembled by polymer nanowires
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Xiaobo Xinga,b, Heng Zhua, Yuqing Wanga, Baojun Lia,*
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a State Key Laboratory of Optoelectronic Materials and Technologies
School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
b Department of Chemistry, Jinan University, Guangzhou 510632, China
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Abstract |
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We report 2?2 and 3?3 optical beam splitters with ultrasmall coupling region assembled by twisting flexible poly(trimethylene terephthalate) (PTT) nanowires. The coupling region of the 2?2 splitter is 1.16-?m wide and 2-?m long, and that of the 3?3 splitter is 1.23-?m wide and 12-?m long. The measured excess loss of the splitters is 0.6 to 0.75 dB. For a specific operation wavelength and/or input branch, desirable splitting ratios can be obtained and tuned by changing the input/output branching angles.
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Keywords |
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Optical beam splitter; Coupler; Nanowire; Polymer
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