Polarization beam splitting in a Glan-Taylor prism based on dual effects of both birefringence and Goos-Hanchen shift

Li, Dongmei; Cai, Guoan; Song, Chenyao; Weng, Chaofan; Chen, Chaoyi; Zheng, Wenqiang; Zhang, Yilong; Li, Kan

doi:10.1016/j.heliyon.2022.e11754

Cited by 3 publications

(1 citation statement)

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“…It has been studied in various wavebands, including the visible, infrared, terahertz, and microwave wavebands [ 4 , 5 , 6 , 7 ]. It has also been widely used in sensors, optical switches, polarization splitting, and other fields [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

2023

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The enhancement of the Goos–Hänchen (GH) shift has become a research hotspot due to its promoted application of the GH effect in various fields. However, currently, the maximum GH shift is located at the reflectance dip, making it difficult to detect GH shift signals in practical applications. This paper proposes a new metasurface to achieve reflection-type bound states in the continuum (BIC). The GH shift can be significantly enhanced by the quasi-BIC with a high quality factor. The maximum GH shift can reach more than 400 times the resonant wavelength, and the maximum GH shift is located exactly at the reflection peak with unity reflectance, which can be applied to detect the GH shift signal. Finally, the metasurface is used to detect the variation in the refractive index, and the sensitivity can reach 3.58 × 106 μm/RIU (refractive index unit) according to the simulation’s calculations. The findings provide a theoretical basis to prepare a metasurface with high refractive index sensitivity, a large GH shift, and high reflection.

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Section: Introductionmentioning

confidence: 99%

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

2023

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Polarization-sensitive optical coherence tomography for birefringence measurement of calcite nonlinear uniaxial crystal

Kasmaee,

Dehshiri,

Khorsandi

2024

Appl. Opt.

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We report on the new application, to the best of our knowledge, of a time-domain optical coherence tomography (TD-OCT) device used to measure the ordinary n o and extraordinary n e indices of calcite birefringence crystal at room temperature. A 1.25±0.05mm thick slab of calcite crystal is cut, polished, and used as a sample in the OCT arm. While the calcite slab is axially scanned, the raw carrier ordinary signals that came from its front and rear facets are received and denoised with a set of digital filters. The extraordinary signals are generated by the change of beam polarization using a 90°-rotating polarizer plate. It is found that the wavelet transform is capable of reaching the highest signal-to-noise ratio (SNR) of about 24.50 and 23.91 for denoising the ordinary and extraordinary signals, respectively. Quantitative measurement of n o and n e is carried out by extracting a desired envelope from the denoised signals using standard methods. Average values of 1.660 and 1.444 are obtained for n o and n e , respectively, using the wavelet-denoised signals. The weights of the results are finally searched with ones obtained from two sets of dispersion equations. We found a very good agreement between the wavelet-denoised OCT- and dispersion equation-based values with a very low relative differences of 0.04% and 2.8% for n o and n e , respectively, when the Ghosh equation is used and averaged ones of 1.3% and 4.2% for n o and n e , respectively, when the Zhao et al. equation is applied.

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Effect of DNA serial dilution on the highly precise broadband plasmonic signature of a BALB/c rat’s dried DNA deposited on gold thin film

Ghasemi,

Nori,

Ariannejad

et al. 2024

Opt. Mater. Express

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An investigation was made to detect the DNA samples of BALB/c rats, exploiting the technique of broadband plasmonic response in the visible spectral regime. In experiments, a non-coherent light beam was physically designed and practically implemented to study the spectral effect due to serial dilution of BALB/c rat’s dried DNA. In particular, three different diluted DNA samples (with ratios of 1:10, 1:20, and 1:40) dried on the surface of a nanolayer gold thin film were considered to retrieve the plasmonic conditions under which the reflectance becomes minimum. The results indicate the most diluted DNA sample exhibits prominent plasmonic conditions, and the resonance wavelengths undergo redshifts with increasing incidence angle (of the p-polarized light). Also, the sensitivity of the configuration is enhanced in the presence of a DNA sample (as compared to the case of non-existence of measurand), which is further increased for larger incidence angles.

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Polarization beam splitting in a Glan-Taylor prism based on dual effects of both birefringence and Goos-Hanchen shift

Cited by 3 publications

References 32 publications

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

Polarization-sensitive optical coherence tomography for birefringence measurement of calcite nonlinear uniaxial crystal

Effect of DNA serial dilution on the highly precise broadband plasmonic signature of a BALB/c rat’s dried DNA deposited on gold thin film

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