One-Dimensional Photonic Crystal with a Defect Layer Utilized as an Optical Filter in Narrow Linewidth LED-Based Sources

Gryga, Michal; Ciprián, Dalibor; Gembalová, Lucie; Hlubina, Petr

doi:10.3390/cryst13010093

Cited by 13 publications

(5 citation statements)

References 67 publications

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“…The thickness of the defect layer governs the resonance wavelength, confining light within the flaw. Altering this thickness impacts the initial band gap and, consequently, the range of wavelengths the crystal can transmit or reflect. , It may also influence guided light’s group velocity and dispersion. Simulation helps identify the optimal defect layer thickness to achieve the desired performance.…”

Section: Design and Optimization Of The One-dimensional Defect Layer ...mentioning

confidence: 99%

One-Dimensional Defect Layer Photonic Crystal Sensor for Purity Assessment of Organic Solvents

Sampath,

Narasimhan

2024

ACS Omega

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This paper presents the design and analysis of a one-dimensional defect layer photonic crystal (1D-DLPC) sensor for the assessment of the purity of chemical solvents with enhanced accuracy. Chemical solvents are frequently used in chemical processes as reaction mediums. It is essential to ascertain its purity since impurities can significantly affect the outcome of the reaction. The structure of the proposed one-dimensional defect layer photonic crystal sensor consists of a defect layer sandwiched between alternate layers of ZnO and SiO 2 organized with a certain periodicity. It has been shown that the localized defect modes inside the structure can detect minute refractive index changes based on the degree of impurity of chemical solvents. Simulation studies have been performed through the transfer matrix method (TMM) and the performance of the design is evaluated using several metrics such as sensitivity, full width at half-maximum, figure of merit, quality factor, and dynamic range. Results indicate that the designed one-dimensional defect layer photonic crystal sensor has a significantly high efficiency and is suitable for detecting impure solvents.

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Section: Design and Optimization Of The One-dimensional Defect Layer ...mentioning

confidence: 99%

One-Dimensional Defect Layer Photonic Crystal Sensor for Purity Assessment of Organic Solvents

Sampath,

Narasimhan

2024

ACS Omega

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“…Optical cavities play a fundamental role in photonics due to their superior ability to confine light in small spatial regions [1][2][3]. As a category of optical cavities, Fabry-Perot cavities have been widely utilized in interferometers [4][5][6], filters [7][8][9][10][11], absorbers [12,13], and polarization manipulation [14,15]. It is known that sandwich structures composed of two metal layers and a dielectric layer can be treated as Fabry-Perot cavities since two metal layers act as two optical mirrors [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Tunable Near-Infrared Transparent Bands Based on Cascaded Fabry–Perot Cavities Containing Phase Change Materials

She,

Zhong,

et al. 2024

Photonics

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In this paper, we construct a near-infrared Fabry–Perot cavity composed of two sodium (Na) layers and an antimony trisulfide (Sb2S3) layer. By cascading two Fabry–Perot cavities, the transmittance peak splits into two transmittance peaks due to the coupling between two Fabry–Perot modes. We utilize a coupled oscillator model to describe the mode coupling and obtain a Rabi splitting of 60.0 meV. By cascading four Fabry–Perot cavities, the transmittance peak splits into four transmittance peaks, leading to a near-infrared transparent band. The near-infrared transparent band can be flexibly tuned by the crystalline fraction of the Sb2S3 layers. In addition, the effects of the layer thickness and incident angle on the near-infrared transparent band and the mode coupling are investigated. As the thickness of the Na layer increases, the coupling strength between the Fabry–Perot modes becomes weaker, leading to a narrower transparent band. As the thickness of the Sb2S3 layer increases, the round-trip propagating of the Sb2S3 layer increases, leading to the redshift of the transparent band. As the incident angle increases, the round-trip propagating of the Sb2S3 layer decreases, leading to the blueshift of the transparent band. This work not only provides a viable route to achieving tunable near-infrared transparent bands, but also possesses potential applications in high-performance display, filtering, and sensing.

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“…Th e waveguides and resonators required for the purpose are implemented through formation of linear and local periodicity defects in the photonic crystals. Th e fi lters based on one-dimensional photonic crystals usually involve the resonators that are formed by a defective layer surrounded on both sides by multilayered periodic structures [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

The Narrow-Band Filter Based on a Magnetophotonic Crystal Involving Layers With Hyperbolic Dispersion Laws

Shmat’ko,

Odarenko

2024

Radio phys. radio astron.

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Subject and Purpose. Narrow-band filters are among the basic components of modern communication systems, instruments for spectros- copy, high-sensitivity sensors, etc. Photonic crystal structures open up broad possibilities for creating compact-sized, narrow-band filters in the optical and terahertz ranges. Tuning of spectral characteristics of photonic crystal filters is usually carried out through introduction of certain elements into their structure that are sensitive to external electric and magnetic fields. This work has been aimed at investigating electrodynamic characteristics of one-dimensional magnetophotonic crystals with structural layers characterized by "hyperbolic" disper- sion, and suggesting a multichannel, narrow-band filter on their base. Methods and Methodology. The dispersion equation for excitations in an infinite magnetophotonic crystal has been obtained within the framework of the Floquet-Bloch theory, with the use of fundamental solutions of Hill’s equation. The transfer matrix approach has been used to obtain an analytical expression for the transmission coefficient. Results. The band diagram of the one-dimensional magnetophotonic crystal has been analyzed for the case where one of the layers on the structure’s spatial period is characterized by a hyperbolic dispersion law. The areas of existence of surface wave regimes have been found for such layers for the case of normal incidence of the wave upon the finite-seized magnetophotonic crystal. Frequency dependences of the transmission coefficient are characterized by a set of high-Q resonant peaks relating to Fabry-Perot resonances in a periodic struc- ture of finite length. Conclusions. Application of a finite-seized, one-dimensional magnetophotonic crystal is considered as of a means forachieving mul- tichannel optical filtering and formation of a frequency comb. Expressions for the dispersion equation and transmission coefficient have been obtained within the framework of the Floquet-Bloch theory and with the use of the transfer matrix. The feasibility of surface mode excitation has been shown for gyrotropic layers of the periodic structure characterized by a hyperbolic dispersion law, for the case of nor- mal incidence upon the magnetophotonic crystal. The spectral response of the filter contains narrow-band peaks with a high transmission efficiency. By increasing the number of the structure’s periods it is possible to form a frequency comb, which effect can be useful for appli- cations in metrology and modern optical communication systems.

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One-Dimensional Photonic Crystal with a Defect Layer Utilized as an Optical Filter in Narrow Linewidth LED-Based Sources

Cited by 13 publications

References 67 publications

One-Dimensional Defect Layer Photonic Crystal Sensor for Purity Assessment of Organic Solvents

One-Dimensional Defect Layer Photonic Crystal Sensor for Purity Assessment of Organic Solvents

Tunable Near-Infrared Transparent Bands Based on Cascaded Fabry–Perot Cavities Containing Phase Change Materials

The Narrow-Band Filter Based on a Magnetophotonic Crystal Involving Layers With Hyperbolic Dispersion Laws

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