A broadband polarization-independent two-port beam splitter under normal incidence based on encapsulated metal-dielectric reflective grating

• 作者: Changhe Zhou Junjie Yu Yunkai Lu Zhengkun Yin
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（7）
• 页码范围: 11-14
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL202018.070501

摘要

An encapsulated metal-dielectric reflective grating is presented for broadband polarization-independent two-port beam splitting under normal incidence at the central wavelength of 800 nm.Different from traditional two-port grating splitters in the resonant region,this grating splitter is capable of separating light energy into ±1st orders with high efficiency in a broad waveband for both TE and TM polarizations.A unified method is proposed here for designing this grating splitter,which enables one to choose a grating structure quickly to realize an ultrabroad workingwaveband.The simulation results indicate that a bandwidth of 46.4 nm could be achieved for diffraction efficiency (defined as the ratio of the light energy diffracted only at the first order to the incident light energy) over 46％ at the central wavelength of 800 nm.Moreover,the parameters of the grating structure can be flexibly adjusted with wavelengths using the unified method for various other applications,such as augmented reality,optical interconnections for computing,coherent beam combination,and complex vector beam shaping.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Zhengkun Yin	中国科学院上海光学精密机械研究所	1	0	0.0	0.0
2	Yunkai Lu	中国科学院上海光学精密机械研究所	1	0	0.0	0.0
3	Junjie Yu	中国科学院上海光学精密机械研究所	1	0	0.0	0.0
4	Changhe Zhou	中国科学院上海光学精密机械研究所	1	0	0.0	0.0