An ultracompact optical polarizer based on the one-dimensional photonic crystals containing anisotropic layers

Jervakani, Ali Teymouri; Darki, Behnam Saghirzadeh

doi:10.1016/j.optcom.2022.128884

Cited by 8 publications

(5 citation statements)

References 26 publications

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“…The strongest attenuation of Fractal NbSe 2 upon laser irradiation reaches 13.3 dB according to the formula of

\alpha ( {dB} )\ = \ |10 \times {{\log }_{10}}( {\mathrm{T}} )|

. [ 26 ] The small Fs and large F th values imply the crystals are very sensitive to the laser input, being able to exert optical limiting at early stages but endure large input influx as well. The laser protection performance is consistent as the I‐scan test of 2D NbSe 2 at 532 nm is repeatable after multiple tests.…”

Section: Resultsmentioning

confidence: 99%

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting

Wang,

Ma,

Wang

et al. 2024

Adv Funct Materials

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The compelling demand for laser protection both for civil and defense use calls for new‐generation nonlinear optical materials. Chemical vapor deposition (CVD) techniques provide extra tricks to modulate crystal optical nonlinearity through fractal growth. The synthesized 2D NbSe2 and its fractal structures exhibit giant, broadband laser attenuation behaviors extending into the near Infrared (NIR) range. Particularly, the optical limiting performance generally correlates with the fractal dimension, where Fractal NbSe2 demonstrates enhanced third‐order optical nonlinearity at a huge nonlinear absorption coefficient of 9.7 × 10−4 m W−1 and an ultralow starting threshold of 5 mJ cm−2 at 532 nm. Various techniques include femtosecond spectroscopy, Density functional theory (DFT) calculation and Kelvin probe force microscopy disclose the origin of the strong nonlinearity of the 2D NbSe2 crystals, and suggest the formation of edge states and overall faster carrier dynamics, larger surface contact potential difference NbSe2 fractals contribute to their even augmented nonlinear responses. Fractal engineering thus opens new avenues to fabricate highly efficient laser protection materials, and the blocking of intense beam (a large attenuation factor over 13.3 dB at 532 nm) while allowing transmission of weak one (a high linear optical transmittance over 80%) fulfills the much desired “smart” defense.

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“…The strongest attenuation of Fractal NbSe 2 upon laser irradiation reaches 13.3 dB according to the formula of

\alpha ( {dB} )\ = \ |10 \times {{\log }_{10}}( {\mathrm{T}} )|

Section: Resultsmentioning

confidence: 99%

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting

Wang,

Ma,

Wang

et al. 2024

Adv Funct Materials

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“…Recently, Jerakani et al proposed an ultra-compact polarizer by using the linear birefringence effect of the uniaxial anisotropic material. They proposed a 1D PhC structure having an anisotropic defect layer, which is used to break the degeneracy of the TE and TM modes of resonance [32]. Figure 3 shows the 1D PhC structure used for the polarizer which has alternating YVO4 and SiO 2 layers.…”

Section: Phc-based Polarization Maintaining Wgsmentioning

confidence: 99%

“…The schematic diagram of the photoni crystal slab is shown in Figure 5. Reprinted/adapted with permission from [32].…”

Section: Phc-based Polarization Maintaining Wgsmentioning

confidence: 99%

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Recent Progress in Photonic Crystal Devices and Their Applications: A Review

Gangwar,

Pathak,

Kumar

2023

Photonics

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The research field of photonic crystals (PhCs) remains active on a global scale. PhCs, which are periodic optical nanostructures with the characteristics of excellent light field confinement and numerous varying degrees of freedom, provide a solid foundation for controlling the movement of light. Periodic variation of the index of refraction in two or three spatial dimensions with a substantial high-to-low ratio generates a number of intriguing phenomena and enables a variety of potential functionalities. Recently, intriguing devices based on PhCs, such as Y-branches, small-diameter bent waveguides, and miniature resonator cavities, have been proposed and extensively utilized. PhC waveguides are considered ideal candidates for a variety of applications, such as in power splitters, logic gates, sensing and communication fields, etc. These exceptional characteristics may facilitate the development of a dense integrated circuit. However, PhC technology is still relatively new and therefore requires additional effort to fully exploit it. This paper reviews the most popular and essential optical components based on PhCs, including power splitters, modulators, polarization maintaining devices, sensors, and lasers, to summarize the most recent developments relating this hot topic. These devices have superior performance and a smaller footprint compared to conventional photonic devices.

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“…Photonic crystals (PhCs) [1] are artificial materials composed of homogeneous and periodic dielectric nanostructures that exhibit the capacity to operate the spread of light owing to their unique properties of photonic localization [2] and photonic band gap (PBG) [3]. Hence, PhCs are propitious for the design and fabrication of optical devices, for instance, optical switches [4], optical sensors [5], optical logic gates [6], optical analog-to-digital converters [7], optical polarizers [8][9][10] and optical CDFs [11,12]. There are methods for preparing photonic crystal devices, such as photolithography [13] and ion beam etching [14].…”

Section: Introductionmentioning

confidence: 99%

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

Zhang,

Yang,

Wang

2024

Photonics

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Photonic crystal channel drop filters (CDFs) play a vital role in optical communication owing to their ability to drop the desired channel. However, it remains challenging to achieve high-efficiency CDFs. Here, we demonstrate a highly efficient three-channel CDF with both high transmission and high quality (Q) factor based on a novel ring resonator that is in the middle of two waveguides. A dielectric column with a large radius replaces the homogeneously distributed dielectric columns inside the ring cavity to modulate the coupling ratio with a straight waveguide, thereby enhancing the transmission and Q factor. The transmission and Q factor of the single-cavity filter are 99.7% and 12,798.4, respectively. The mean value of the three-channel filter based on the basic unit can reach up to 94.6% and 10,617, respectively, and a crosstalk between −30.16 and −50.61 dB is obtained. The proposed CDFs provide efficient filter capability, which reveals great potential in integrated optoelectronics and optical communication.

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An ultracompact optical polarizer based on the one-dimensional photonic crystals containing anisotropic layers

Cited by 8 publications

References 26 publications

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting

Recent Progress in Photonic Crystal Devices and Their Applications: A Review

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

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An ultracompact optical polarizer based on the one-dimensional photonic crystals containing anisotropic layers

Cited by 8 publications

References 26 publications

Fractal Growth of 2D NbSe2 for Broadband Nonlinear Optical Limiting

Fractal Growth of 2D NbSe2 for Broadband Nonlinear Optical Limiting

Recent Progress in Photonic Crystal Devices and Their Applications: A Review

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

Contact Info

Product

Resources

About

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting

Fractal Growth of 2D NbSe₂ for Broadband Nonlinear Optical Limiting