Control of radiation angle by introducing symmetric end structure to oblique waveguide in three-dimensional photonic crystal

Control of radiation angle by introducing symmetric end structure to oblique waveguide in three-dimensional photonic crystal

We investigate the radiation angle of an oblique waveguide in a stripe-stacked three-dimensional photonic crystal. We show that the output-light is radiated in a different direction from the oblique waveguide direction. Moreover, the radiation polar angle varies from 30° to 50° depending on the freq...

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Veröffentlicht in:Optics express 2016-06, Vol.24 (12), p.13518-13526
Hauptverfasser: Gondaira, Kou, Ishizaki, Kenji, Kitano, Keisuke, Asano, Takashi, Noda, Susumu
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container_end_page 13526
container_issue 12
container_start_page 13518
container_title Optics express
container_volume 24
creator Gondaira, Kou
Ishizaki, Kenji
Kitano, Keisuke
Asano, Takashi
Noda, Susumu
description We investigate the radiation angle of an oblique waveguide in a stripe-stacked three-dimensional photonic crystal. We show that the output-light is radiated in a different direction from the oblique waveguide direction. Moreover, the radiation polar angle varies from 30° to 50° depending on the frequency. To inhibit the frequency dependence and obtain vertical radiation, we introduced a symmetric structure at the end of the waveguide. As a result of cancellation of the in-plane asymmetric wavenumber, the radiation polar angle is less than 6° from the surface-normal direction and does not depend on frequency.
doi_str_mv 10.1364/OE.24.013518
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title Control of radiation angle by introducing symmetric end structure to oblique waveguide in three-dimensional photonic crystal
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