Hybrid Photonic Crystal-Surface Plasmon Polariton Waveguiding System for On-Chip Sensing Applications

Jannesari, Reyhaneh; Abasahl, Banafsheh; Grille, Thomas; Jakoby, Bernhard

doi:10.3390/proceedings2130864

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…The mid-infrared spectrum has been called the “fingerprint” region of molecules because it contains distinctive absorption lines for many gases, including CO 2 , CH 4 , CO, etc. [ 23 , 24 ]. These types of sensors typically have four components: an IR light source, a bandpass filter that selects the target wavelength, an interaction path with the gas, and a detector.…”

Section: Methodsmentioning

confidence: 99%

Design of a Narrow Band Filter Based on a Photonic Crystal Cavity for CO2 Sensing Application

Jannesari

Grille

Stocker

et al. 2023

Sensors

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This paper investigates the use of a miniaturized filter based on a triangular lattice of holes in a photonic crystal (PhC) slab. The plane wave expansion method (PWE) and finite-difference time-domain (FDTD) techniques were utilized to analyze the dispersion and transmission spectrum, as well as the quality factor and free spectral range (FSR) of the filter. A 3D simulation has demonstrated that for the designed filter, an FSR of more than 550 nm and a quality factor of 873 can be attained by adiabatically coupling light from a slab waveguide into a PhC waveguide. This work designs a filter structure that is implemented into the waveguide and is suitable for a fully integrated sensor. The small size of the device provides a strong potential for the realization of large arrays of independent filters on a single chip. The fully integrated character of this filter has further advantages such as reducing power loss in coupling light from sources to filters and also from filters to waveguides. The ease of fabrication is another benefit of completely integrating the filter.

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Section: Methodsmentioning

confidence: 99%

Design of a Narrow Band Filter Based on a Photonic Crystal Cavity for CO2 Sensing Application

Jannesari

Grille

Stocker

et al. 2023

Sensors

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“…The infrared absorption spectroscopy has high sensitivity and selectivity associated with the characteristic spectral absorption pattern of an analyte [ 18 ]. The PCWG of Si rods used in this work can enhance the light–matter interaction, which leads to improved sensitivity, which is particularly important when sensing dilute gases [ 19 ].…”

Section: Photonic Crystal and Taper Structurementioning

confidence: 99%

“…Therefore, this parameter is used to tune the frequency of PCWG mode to the desired frequency range. The

is chosen for this study because the PCWG is designed for CO 2 sensing [ 19 , 20 ] Figure 2 a,b presents a schematic view of the PCWG.…”

Section: Photonic Crystal and Taper Structurementioning

confidence: 99%

“…Therefore, this parameter is used to tune the frequency of PCWG mode to the desired frequency range. The R d = 0.06a is chosen for this study because the PCWG is designed for CO 2 sensing [19,20] In this work, the photonic crystal taper is depicted by deforming and cleaving the photonic crystal lattice according to the following equation The photonic crystal taper operates within a photonic bandgap to diminish the loss due to the coupling to the bulk of the photonic crystal. A mode with a frequency inside the bandgap cannot propagate inside the PhC structure.…”

Section: Photonic Crystal and Taper Structurementioning

confidence: 99%

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Design of a Curved Shape Photonic Crystal Taper for Highly Efficient Mode Coupling

Jannesari

Grille

Consani

et al. 2021

Sensors

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The design and modeling of a curved shape photonic crystal taper consisting of Si rods integrated with a photonic crystal waveguide are presented. The waveguide is composed of a hexagonal lattice of Si rods and optimized for CO2 sensing based on absorption spectroscopy. We investigated two different approaches to design a taper for a photonic crystal waveguide in a hexagonal lattice of silicon rods. For the first approach (type 1), the taper consists of a square lattice taper followed by a lattice composed of a smooth transition from a square to a hexagonal lattice. In the second approach (type 2), the taper consists of a distorted hexagonal lattice. Different shapes, such as convex, concave, and linear, for the curvature of the taper were considered and investigated. The structure of the taper was improved to enhance the coupling efficiency up to 96% at a short taper length of 25 lattice periods. The finite-difference time-domain (FDTD) technique was used to study the transmission spectrum and the group index. The study proves the improvement of coupling using a curved shape taper. Controlling the group index along the taper could be further improved to enhance the coupling efficiency in a wider spectral range.

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“…Here, we will first present the overall idea, which consists of the combination of pillar photonic crystal waveguides with plasmonic elements to provide maximal interaction with gaseous analytes [1]. Then, we describe the characterization of the very first test structures, which were fabricated.…”

Section: Introductionmentioning

confidence: 99%

Towards Integrated Plasmonic Gas Sensors in the MWIR

Tortschanoff

Spettel²,

Stocker³

et al. 2021

The 8th International Symposium on Sensor Science

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Optical measurement approaches have proven to provide intrinsic selectivity and the sensitivity, required for the development of integrated gas sensors. In an ongoing project, we work towards a Si-photonics non-dispersive infrared gas sensor and are investigating the possibility of the incorporation of IR-plasmonic materials, which could allow an increase in sensitivities and reduce the size of such sensors. Here we present the basic concept and discuss in some detail first results concerning fabrication and characterization of the plasmonic properties.

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Hybrid Photonic Crystal-Surface Plasmon Polariton Waveguiding System for On-Chip Sensing Applications

Cited by 7 publications

References 7 publications

Design of a Narrow Band Filter Based on a Photonic Crystal Cavity for CO2 Sensing Application

Design of a Narrow Band Filter Based on a Photonic Crystal Cavity for CO2 Sensing Application

Design of a Curved Shape Photonic Crystal Taper for Highly Efficient Mode Coupling

Towards Integrated Plasmonic Gas Sensors in the MWIR

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