Bavil Mehdi Afshari, Zhou Zhiping, Deng Qingzhong
State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China.
Opt Express. 2013 Jul 15;21(14):17066-76. doi: 10.1364/OE.21.017066.
Highly efficient, active and compact, unidirectional surface plasmon (SP) propagator composed of double subwavelength slits; filled with organic electro-optic (EO) material is proposed and investigated. By selecting appropriate structure parameters, obtained by solving phase relations between slits, the relative phase of SP generated at the slit exit aperture can be tailored. Simulation results show under normal illumination and external voltage of 8.7 V, SP launching efficiency of 55% and unidirectional SP extinction ratio about 47dB at wavelength of 632.8 nm is achieved. The power consumption of the structure is on the order of 9 fJ/bit which meet the power consumption limitation for optical devices. Moreover, the structure is very compact with effective total length of 1.2 µm and thickness of 0.6 µm.
提出并研究了一种由双亚波长狭缝组成、填充有机电光（EO）材料的高效、有源且紧凑的单向表面等离子体（SP）传播器。通过选择合适的结构参数（通过求解狭缝之间的相位关系获得），可以调整在狭缝出射孔径处产生的SP的相对相位。仿真结果表明，在正常照明和8.7 V的外部电压下，在632.8 nm波长处实现了55%的SP发射效率和约47 dB的单向SP消光比。该结构的功耗约为9 fJ/bit，满足光学器件的功耗限制。此外，该结构非常紧凑，有效总长度为1.2 µm，厚度为0.6 µm。
