Effects of hydrostatic pressure on the band structure in two-dimensional semiconductor square photonic lattice with defect

Segovia-Chaves, Francis; Vinck-Posada, Herbert

doi:10.1016/j.physb.2018.06.014

Cited by 34 publications

(5 citation statements)

References 44 publications

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“…The reported results indicate that the optical response in two-dimensional photonic crystals (2D-PC) is mainly due to the applied pressure. This is confirmed in the study by F. Segovia et al [24,25], which reports the shift to higher frequencies of the PBS with increasing applied pressure in 2D-PC when the circular scatterers are arranged in a square and hexagonal lattice. A similar behavior of the PBS with pressure is found when considering triangular cross-section air scatterers embedded in GaAs [26,27].…”

Section: Introductionsupporting

confidence: 72%

Photonic band structure in a two-dimensional photonic crystal with a Sierpinski triangle structure

Segovia-Chaves¹,

Navarro-Barón²,

Vinck-Posada³

2021

Phys. Scr.

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The plane wave expansion method was used to calculate the photonic band structure of a hexagonal lattice in which the triangular GaAs scatterers have a Sierpinski structure. In triangles with lengths of less than 0.6 a, in the photonic band structure for low frequencies, the photonic band gaps appear mainly in the transverse-magnetic polarization, as shown by the results. Nevertheless, when the size of triangles increases above 0.8 a, an overlap of the photonic band gap in the transverse-electric and transverse-magnetic polarizations occurs. Hence, a complete photonic band gap is produced, where the photonic modes cannot propagate in either direction. In addition, we detected that another optimal condition for creating a complete photonic band gap is that the dielectric contrast should be greater than 12. Likewise, the pressure and temperature dependence of the GaAs dielectric constant are considered, detecting a higher frequency shift of the photonic band structure, when the temperature remains constant at 4 K and the pressure increases from 0 to 70 kbar.

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Section: Introductionsupporting

confidence: 72%

Photonic band structure in a two-dimensional photonic crystal with a Sierpinski triangle structure

Segovia-Chaves¹,

Navarro-Barón²,

Vinck-Posada³

2021

Phys. Scr.

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“…N. Porras y C. Duque [23] utilizaron el MEOP para analizar la dependencia de la presión hidrostática y la temperatura sobre la EBF de un CF bidimensional, para la polarización TM y TE, reportaron que al modificar la presión hidrostática y la temperatura generaba desplazamientos de la EBF, además generaba cambios en el ancho de las bandas prohibidas superiores para la polarización TM y para la polarización TE permanecían inalteradas. F. Segovia y H. Vinck [24] trabajaron la EBF de un CF-2D defectivo con red cuadrada compuesto por cilindros infinitos de un semiconductor en un fondo de aire utilizando el MEOP, analizaron los efectos de la temperatura y la presión hidrostática, sus resultados presentaron un desplazamiento del modo defectivo a altas frecuencias a medida que aumentaban la presión hidrostática manteniendo una temperatura constante dentro de la BFP. Las anteriores investigaciones se centraron en estudiar estructuras compuestas por GaAs, de acuerdo con estos resultados, surge la necesidad de un estudio adicional sobre sobre un material semiconductor perteneciente también al grupo III-V que no altere drásticamente el valor de la permitividad dieléctrica al variar un agente externo.…”

Section: Antecedentesunclassified

Efectos de la presión hidrostática sobre los modos defectivos en un cristal fotónico bidimensional semiconductor con geometría hexagonal

Perdomo

Jiménez

2021

BISTUA

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Las propiedades ópticas de las estructuras caracterizadas mediante una función dieléctrica periódica como los cristales fotónicos (CFs), ha despertado interés por sus aplicaciones en diversos campos de la óptica y la optoelectrónica. Cuando la periodicidad de los CFs se rompe por la inserción de defectos, permite el confinamiento de modos de luz. En esta contribución, utilizando el método de expansión en ondas planas para el modo de polarización transversal magnética y el Software computacional MATLAB, se estudia el efecto de la presión hidrostática sobre la estructura de bandas en un cristal fotónico bidimensional (CF-2D) con red hexagonal, compuesto por agujeros de aire en un fondo de material semiconductor defosfuro de galio (GaP), que se caracteriza por tener el índice de refracción más alto entre los semiconductores binarios y su rango de transmisión se utiliza en aplicaciones de luz visible e infrarrojo cercano. Inicialmente, se estudia la relación de dispersión del cristal fotónico regular (sin defecto) y se analiza la zona de Banda Fotónica Prohibida (BFP); posteriormente seaumenta la presión hidrostática, generando que la estructura de banda fotónica presente un desplazamiento a regiones de alta frecuencia. Posteriormente, utilizando la técnica de la supercelda se considera un defecto puntual dentro de la estructura, que reemplaza un agujero de aire por material semiconductor, que genera estados permitidos o modos de defecto en el interior del bandgap fotónico. Al aumentar la presión hidrostática se observa que el ancho del bandgap fotónico permanece inalterado y los modos de defecto presentan un desplazamiento a valores de altas frecuencias.

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“…There are several numeric tools that can be used for the calculation of the photonic crystal band structure, such as the plane wave expansion and finite element methods. (12,13) Although the photonic crystal band structure is strongly related to the geometric configuration and refractive index distribution of photonic crystals, the relationships among them are not intuitive. The change in band structure depending on the geometric parameters and refractive index distribution is complex and nonlinear.…”

Section: Introductionmentioning

confidence: 99%

Using Autoencoder Artificial Neural Network to Predict Photonic Crystal Band Structure

Chang,

Tsai,

Chiang

et al. 2023

Sensors and Materials

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A photonic crystal is an artificial material with a periodic optical refractive index. The band structure of photons can be tailored by adjusting the geometric parameters spatially. By properly designing the configuration, the photonic crystal can generate an optical forbidden band within the structure. To choose an appropriate geometric configuration that can generate a photonic band gap in the desired frequency range, traditionally, the band structure of such structure has been obtained by applying Floquet periodic boundary conditions and performing the eigen analysis calculation. However, a great amount of testing is required and consumes a great amount of time. In our study, the top view of the unit cell is converted to a binary bitmap and encoded to downgrade the bitmap for forming the input data of the artificial neural network. We adopted the finite element method to calculate the band structure training data set, which contained various geometric parameters and corresponding band structures. Our neural network shows high accuracy and is less time-consuming. The results are useful for the inverse design of photonic crystals.

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Effects of hydrostatic pressure on the band structure in two-dimensional semiconductor square photonic lattice with defect

Cited by 34 publications

References 44 publications

Photonic band structure in a two-dimensional photonic crystal with a Sierpinski triangle structure

Photonic band structure in a two-dimensional photonic crystal with a Sierpinski triangle structure

Efectos de la presión hidrostática sobre los modos defectivos en un cristal fotónico bidimensional semiconductor con geometría hexagonal

Using Autoencoder Artificial Neural Network to Predict Photonic Crystal Band Structure

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