Impact of thermal and refractive index tuning on the bandgap and band-edges of a silicon photonic crystal waveguide with sensing applications

Sherawat, Varnam; Bokolia, Renuka; Sinha, R. K.

doi:10.1016/j.optcom.2022.128348

Cited by 7 publications

(8 citation statements)

References 26 publications

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“…The photonic band diagram of the PhC structure for TM mode, obtained for an applied pressure of 1 GPa is depicted in Figure 2. The band diagram shows the existence a considerably large photonic bandgap for the TM mode between bands 1 and 2. , at various values of applied pressure, is calculated from the bandedges as per the following equation: 12…”

Section: Discussion and Resultsmentioning

confidence: 99%

“…Optical sensors have been employed to detect various physical quantities like temperature 1 , pressure 2 , chemical concentration 3 , humidity 4 , gases 5 and displacement. 6 They have shown great capacity in sensing applications compared to electrical sensors due to their small size, high sensitivity, anti-electromagnetic interference and good biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

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Tunable pressure sensor based on two-dimensional silicon photonic crystal

Sherawat,

Bokolia,

Sinha

2023

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII

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The proposed work presents the design of a photonic crystal structure based on silicon with a square lattice arrangement. It probes the effect of pressure variation on the photonic bandgap and midgap wavelength of the structure. The photonic crystal structure shows a bandgap for the TM mode. The variation in the refractive index of silicon with pressure is utilized to study the bandgap characteristics of the structure with a change in applied pressure. It is observed that the midgap wavelength varies linearly with variations in pressure. This linear variation indicates the application of the proposed structure as a pressure sensor.

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Section: Discussion and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable pressure sensor based on two-dimensional silicon photonic crystal

Sherawat,

Bokolia,

Sinha

2023

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII

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View full text Add to dashboard Cite

show abstract

“…Passive waveguides, such as parallel plate waveguides, metallic rectangular waveguides, metallic circular waveguides, slot lines, striplines, photonic crystal waveguides, and ribbon waveguides, have been widely utilized for interconnecting with external power sources, testing, and packaging purposes [ 4 ]. Waveguides are a popular choice for nanophotonic systems due to their ability to confine light within the metallic walls of the waveguide through total internal reflection (TIR) [ 5 ], the photonic bandgap (PBG) effect [ 6 , 7 ] and guided wave by metallic media (GMM) principle [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

A high figure of merit of phonon-polariton waveguide modes with hbn/SiO2/graphene /hBN ribs waveguide in mid-infrared range

Sheng,

Yue,

Zhao

et al. 2024

Heliyon

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“…Optical sensors have exhibited great capacity in sensing physical quantities such as chemical concentration [2], humidity [3], gases [4], bio-analytes [5] etc. Photonic crystals (PhCs) have been used for various sensing applications like gas sensing [6], chemical sensing [7], temperature sensing [8,9], biosensing [9][10][11], etc. due to their high sensitivity over the slightest change in refractive index.…”

Section: Introductionmentioning

confidence: 99%

Pressure-dependent bandgap characteristics in photonic crystals with sensing applications

Sherawat,

Bokolia,

Sinha

2024

J. Opt.

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The present study elucidates a photonic crystal (PhC)-based pressure sensor exploiting the change in refractive index with pressure and the corresponding structural deformation of the dielectric material. The stress-sensitive refractive indices of the constituent materials of the PhC have been considered to study the effect of applied pressure on the photonic bandgap (PBG) characteristics of the structure. The designed pressure sensor, proposed using a two-dimensional hexagonal lattice arrangement of air holes in a dielectric slab, operates in the high-pressure range of 1–6 GPa. A comparative study of the PBG characteristics with the application of high pressure has been reported for three semiconducting materials—GaAs, Ge and Si, used for the dielectric slab in the proposed structure. GaAs is found to exhibit the highest sensitivity to pressure variations and shows more pronounced shifting of the midgap wavelength with pressure in comparison to Ge and Si. The largest PBG is seen in the Ge-based structure, closely followed by the GaAs and Si-based structures. The proposed structure is suitable for high-pressure sensing applications.

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Impact of thermal and refractive index tuning on the bandgap and band-edges of a silicon photonic crystal waveguide with sensing applications

Cited by 7 publications

References 26 publications

Tunable pressure sensor based on two-dimensional silicon photonic crystal

Tunable pressure sensor based on two-dimensional silicon photonic crystal

A high figure of merit of phonon-polariton waveguide modes with hbn/SiO2/graphene /hBN ribs waveguide in mid-infrared range

Pressure-dependent bandgap characteristics in photonic crystals with sensing applications

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