A wide band porous silicon omnidirectional mirror for the near infrared range

Chavez-Castillo, B. A.; Pérez-Huerta, J.S.; Madrigal-Melchor, J.; Amador-Alvarado, S.; Sustaita-Torres, I. A.; Agarwal, Vivechana; Ariza-Flores, D.

doi:10.1063/1.5144621

Cited by 15 publications

(5 citation statements)

References 33 publications

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“…3(b) we compare the calculated and measured reflectance for the structure 3 at several angles of incidence. Although, the quasi omnidirectional wavelength range of the synthesized structure, from 950 to 2750 nm, is slightly smaller than the calculated one, the measured PBG is almost twice as wide as a recently reported PS chirped structure [30], which has the largest previously reported ODW.…”

Section: Photonic Structure With Sub-mirrors Stackingcontrasting

confidence: 58%

“…The measured reflectance is lower than the calculated one, more so at small wavelengths and large angles. This difference may be partially attributed to the scattering of light due to the roughness present at the sample [43,30,29] that we have not taken into account in our theory. Due to the limitations of our spectrophotometer, we couldn't perform measurements for > 60 • and thus check the ODB.…”

Section: Chirped-type Bragg Mirrorsmentioning

confidence: 93%

“…Many equivalent formulations have been proposed to obtain and use [28,29,30]. Here we use a recently developed formalism for the numerically stable calculation of the reflectance of large multilayer systems, as proposed by Puente-Díaz, et al [31], summarized in the supplementary information.…”

Section: Theorymentioning

confidence: 99%

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Optimization of wide-band quasi-omnidirectional 1-D photonic structures

Castillo-Gallardo,

Puente-Díaz,

Ariza-Flores

et al. 2021

Preprint

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We have designed, optimized, fabricated and characterized highly reflective quasi-omnidirectional (angular range of 0 − 60 • ) multilayered structures with a wide spectral range. Two techniques, chirping (a continuous change in thicknesses) and stacking of Bragg-type sub-structures, have been used to enhance the reflectance with minimum thickness for a given pair of refractive indices. Numerical calculations were carried out employing the transfer matrix method and we optimized the design parameters to obtain maximal reflectance averaged over different spectral ranges for all angles. We fabricated some of the optimized structures with porous silicon dielectric multilayers with low refractive contrast and compared their measured optical properties with the calculations. Two chirped structures with thicknesses 21.6 m and 60.4 m, resulting in quasi omnidirectional mirrors with bandwidths of 360 nm and 1800 nm, centered at 1160 nm and 1925 nm respectively have been shown. In addition, we fabricated a stacked sub-Bragg mirror structure with a quasi omnidirectional bandwidth of 1800 nm (centered at 1850 nm) and a thickness of 41.5 m, which is almost two third (in thickness) of the chirped structure. Thus, our techniques allowed us to obtain relatively thin quasi-omnidirectional mirrors with wide bands over different wavelength ranges. Our analysis techniques can be used for the optimization of the reflectance not only in multilayered PS systems with different refractive index contrasts but also for systems with other types of materials with low refractive index contrast. The present study could also be useful for obtaining omnidirectional dielectric mirrors in large spectral regions using different materials, flat focusing reflectors, thermal regulators, or, if defects are included, as filters or remote chemical/biosensors with a wide angular independent response.

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Section: Photonic Structure With Sub-mirrors Stackingcontrasting

confidence: 58%

Section: Chirped-type Bragg Mirrorsmentioning

confidence: 93%

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Optimization of wide-band quasi-omnidirectional 1-D photonic structures

Castillo-Gallardo,

Puente-Díaz,

Ariza-Flores

et al. 2021

Preprint

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“…[25,34] Moreover, the obtained results were compared with those of a simulation method that predicts the behavior of the reflection spectrum of the photonic crystal when it is decorated or not with polyNI-PAM spheres (Figure S1). The simulation is based on the well-known transfer matrix method [35,36] and the Bruggeman equation, [37][38][39] which is used to reproduce the optical behavior of a porous silicon matrix. The geometric model displayed in Figure 4 is proposed for simulating the effect of polyNIPAM on the optical behavior of the photonic crystals.…”

Section: Optical Response Of Hybrid Sensormentioning

confidence: 99%

Stimuli‐responsive hydrogel microgels on porous silicon one‐dimensional photonic crystals: Tapping the full potential for optical sensor applications

Valadez,

Flores,

Pacholski

2023

Nano Select

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Porous silicon 1D photonic crystals, namely rugate filters, are covered with a loosely packed hexagonally ordered array of stimuli‐responsive hydrogel microgels, and the optical properties of the resulting hybrid sensor are thoroughly investigated. For this purpose, both rugate filters with and without hydrogel microgel on top are immersed in ethanol/water mixtures possessing different compositions and NaCl solutions. Reflectance spectra of all samples are taken and analyzed concerning the spectral positions and reflectance intensity of the strong peak related to the photonic crystal rugate peak as well as the side bands resulting from Fabry–Pérot interference at the interfaces bordering the porous silicon. For the latter analysis, a Fourier transform is applied to the side bands for calculating the effective optical thickness (EOT). Thereby it can be shown that the spectral position of both the rugate peak and the EOT peak is best suited for monitoring refractive index changes in the immersion medium whereas the swelling and collapse of the stimuli‐responsive hydrogel microgel can be only detected by variations in the amplitude of the rugate peak and the EOT peak. These results are confirmed by simulations using a simple geometrical model and shall serve as guide for developing tailor‐made optical sensors.

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“…In high-power continuous laser systems, silicon-based materials are commonly used as cavity mirrors, mirrors, and other optical components due to their excellent integrated thermal performance ratios and mid-infrared optical properties. The quality of the mirrors directly determines the performance of the laser system [ 12 , 13 , 14 , 15 ]. With the development of high-power lasers, the lenses in laser systems need to withstand higher and higher power densities, and the most important limiting factor for the performance of the lenses is the damage precursor.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Surface Quality and Damage Properties of Single-Crystal Silicon Using Different Post-Treatment Processes

Li,

Zha,

et al. 2024

Micromachines

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Detecting subsurface defects in optical components has always been challenging. This study utilizes laser scattering and photothermal weak absorption techniques to detect surface and subsurface nano-damage precursors of single-crystal silicon components. Based on laser scattering and photothermal weak absorption techniques, we successfully establish the relationship between damage precursors and laser damage resistance. The photothermal absorption level is used as an important parameter to measure the damage resistance threshold of optical elements. Single-crystal silicon elements are processed and post-processed optimally. This research employs dry etching and wet etching techniques to effectively eliminate damage precursors from optical components. Additionally, detection techniques are utilized to comprehensively characterize these components, resulting in the successful identification of optimal damage precursor removal methods for various polishing types of single-crystal silicon components. Consequently, this method efficiently enhances the damage thresholds of optical components.

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A wide band porous silicon omnidirectional mirror for the near infrared range

Cited by 15 publications

References 33 publications

Optimization of wide-band quasi-omnidirectional 1-D photonic structures

Optimization of wide-band quasi-omnidirectional 1-D photonic structures

Stimuli‐responsive hydrogel microgels on porous silicon one‐dimensional photonic crystals: Tapping the full potential for optical sensor applications

A Study on the Surface Quality and Damage Properties of Single-Crystal Silicon Using Different Post-Treatment Processes

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