Geometrical representation of coherent tunneling process in two-waveguide and three-waveguide coupler

doi:10.1088/1674-1056/26/12/124214

Abstract We propose an identical geometrical representation scheme for both Landau-Zener (LZ) tunneling process in two-waveguide coupler with a cubically bent structure and stimulated Raman adiabatic passage (STIRAP) in three-waveguide coupler, similar to the geometrical representation of sum frequency process. The results show that although the two-waveguide coupler with a cubically bent axis has not aperiodic structure, it acts as a chirped quasi-phase-matching (QPM) grating and corrects the relative phase between the two supermodes in the curved coupler system. We present a scheme about how to choose the parameters to design the curved beam splitter.

Keywords: optical coupler adiabatic passage non-adiabatic passage Bloch vector

Received: 09 May 2017
Revised: 01 July 2017
Accepted manuscript online:

PACS:	42.82.Et	(Waveguides, couplers, and arrays)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	32.80.Qk	(Coherent control of atomic interactions with photons)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304247 and 61505161) and the Shaanxi Provincial Research Plan for Young Scientific and Technological New Stars, China (Grant No. 2015KJXX-40).

Corresponding Authors: Jian Shi
E-mail: shijian@xupt.edu.cn

Cite this article:

Jian Shi(时坚), Rui-Qiong Ma(马瑞琼), Zuo-Liang Duan(段作梁), Meng Liang(梁猛), Bao-Yu Chai(柴宝玉), Jun Dong(董军) Geometrical representation of coherent tunneling process in two-waveguide and three-waveguide coupler 2017 Chin. Phys. B 26 124214

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Geometrical representation of coherent tunneling process in two-waveguide and three-waveguide coupler

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