Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides
We theoretically investigate light propagation in two coupled nonlinear waveguides with a certain static propagation constant detuning between two waveguides and with the linear refractive index modulated along the propagation direction. By slowly varying the amplitude of modulation, we steer the li...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-12-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379719316006 |
| _version_ | 1818317330616156160 |
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| author | Jin Cui Baiyuan Yang Xiaobing Luo Lei Li Xiaoguang Yu |
| author_facet | Jin Cui Baiyuan Yang Xiaobing Luo Lei Li Xiaoguang Yu |
| author_sort | Jin Cui |
| collection | DOAJ |
| description | We theoretically investigate light propagation in two coupled nonlinear waveguides with a certain static propagation constant detuning between two waveguides and with the linear refractive index modulated along the propagation direction. By slowly varying the amplitude of modulation, we steer the light to the desired output waveguide when equal amounts of lights are launched into each waveguide. We reveal that depending on the sign of the static propagation constant mismatch (detuning) between two waveguides, the launched light can be completely switched to either of waveguides. Additionally, we numerically examine the performances of light switching for general inputs and modulation amplitudes, and show that the localization of output light is robust against small to moderate variations in the final modulation amplitude, phase difference and intensity distribution of input field between two waveguides. More importantly, according to the principle of the proposed scheme, we are capable of steering the output light to the targeted waveguide at extremely low input power. In theory, our findings can be explained qualitatively by means of adiabatic navigation of the so-called nonlinear Floquet states. Keywords: Light tunneling, Adiabatic passage, Nonlinear waveguides |
| first_indexed | 2024-12-13T09:35:37Z |
| format | Article |
| id | doaj.art-ff63c31ccc764758b76b56477debee54 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-13T09:35:37Z |
| publishDate | 2019-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-ff63c31ccc764758b76b56477debee542022-12-21T23:52:21ZengElsevierResults in Physics2211-37972019-12-0115Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguidesJin Cui0Baiyuan Yang1Xiaobing Luo2Lei Li3Xiaoguang Yu4Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China; Department of Physics, Jinggangshan University, Ji’an 343009, ChinaDepartment of Physics, Jinggangshan University, Ji’an 343009, ChinaDepartment of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China; Department of Physics, Jinggangshan University, Ji’an 343009, China; State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China; Corresponding author at: Department of Physics, Jinggangshan University, Ji’an 343009, China.Department of Physics, Jinggangshan University, Ji’an 343009, ChinaDepartment of Physics, Jinggangshan University, Ji’an 343009, ChinaWe theoretically investigate light propagation in two coupled nonlinear waveguides with a certain static propagation constant detuning between two waveguides and with the linear refractive index modulated along the propagation direction. By slowly varying the amplitude of modulation, we steer the light to the desired output waveguide when equal amounts of lights are launched into each waveguide. We reveal that depending on the sign of the static propagation constant mismatch (detuning) between two waveguides, the launched light can be completely switched to either of waveguides. Additionally, we numerically examine the performances of light switching for general inputs and modulation amplitudes, and show that the localization of output light is robust against small to moderate variations in the final modulation amplitude, phase difference and intensity distribution of input field between two waveguides. More importantly, according to the principle of the proposed scheme, we are capable of steering the output light to the targeted waveguide at extremely low input power. In theory, our findings can be explained qualitatively by means of adiabatic navigation of the so-called nonlinear Floquet states. Keywords: Light tunneling, Adiabatic passage, Nonlinear waveguideshttp://www.sciencedirect.com/science/article/pii/S2211379719316006 |
| spellingShingle | Jin Cui Baiyuan Yang Xiaobing Luo Lei Li Xiaoguang Yu Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides Results in Physics |
| title | Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| title_full | Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| title_fullStr | Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| title_full_unstemmed | Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| title_short | Controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| title_sort | controlling light tunneling by adiabatic passage in two modulated nonlinear waveguides |
| url | http://www.sciencedirect.com/science/article/pii/S2211379719316006 |
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