Design of ultra-short polarization convertor with enhanced birefringence by photonic crystals

Chen, Chii Chang

doi:10.1016/j.rinp.2021.104138

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…One particular avenue that was recently proposed in this context is using the photonic crystal [ 27 ]. Chen designed a polarization rotator based on one-dimensional photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Design of Waveguide Polarization Convertor Based on Asymmetric 1D Photonic Crystals

Hsiao

Tsai

et al. 2022

Nanomaterials

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Photonic crystals possess metastructures with a unique dispersion relation. An integrated optical circuit plays a crucial role in quantum computing, for which miniaturized optical components can be designed according to the characteristics of photonic crystals. Because the stable light transmission mode for a square waveguide is transverse electric or transverse magnetic polarization, we designed a half-waveplate element with a photonic crystal that can rotate the polarization direction of the light incident on a waveguide by 90°. Using the dispersion relation of photonic crystals, the polarization rotation length and the optical axis’s angle of deviation from the electric field in the eigenmode can be effectively calculated. Polarization rotators designed on the basis of photonic crystal structures can effectively reduce the insertion loss of components and exhibit favorable polarization rotation performance.

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“…One particular avenue that was recently proposed in this context is using the photonic crystal [ 27 ]. Chen designed a polarization rotator based on one-dimensional photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Design of Waveguide Polarization Convertor Based on Asymmetric 1D Photonic Crystals

Hsiao

Tsai

et al. 2022

Nanomaterials

Self Cite

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“…The maximum reflectivity is around −2.5 dB (56%). We recently reported two novel transmission-type polarization rotators based on shifted circular and rectangular air holes in a silicon waveguide [ 18 , 19 ], which could be used in quantum computing as the logic gates. The device length can be shorter than the L-shaped or trench waveguides [ 20 , 21 , 22 , 23 ] due to the higher birefringent effect formed by photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Design of Reflective Polarization Rotator in Silicon Waveguide

et al. 2022

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In this work, we investigate theoretically the reflective polarization rotator in a silicon waveguide formed by periodically arranged rectangular air holes. The etched air holes generate the large birefringence for the waveguide. The effective refractive index of the non-etched waveguide is isotropic. The structure can be regarded as a stack of alternating birefringent waveplates and isotropic material similar to the folded Šolc filter. The band structure of the stack of birefringent waveplates with isotropic background is calculated to confirm the fact that high reflection peaks in the reflection spectra of the waveguide result from the photonic bandgap. The polarization extinction ratio for the reflected light is 15.8 dB. The highest reflectivity of the device is 93.1%, and the device length is 9.21 μm. An ultra-wide operation bandwidth from 1450.3 to 1621.8 nm can be achieved.

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Design of ultra-short polarization convertor with enhanced birefringence by photonic crystals

Cited by 2 publications

References 27 publications

Design of Waveguide Polarization Convertor Based on Asymmetric 1D Photonic Crystals

Design of Waveguide Polarization Convertor Based on Asymmetric 1D Photonic Crystals

Design of Reflective Polarization Rotator in Silicon Waveguide

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