An Optimal Au Grating Structure for Light Absorption in Amorphous Silicon Thin Film Solar Cell

Ashfaq

et al. 2021

Preprint

Self Cite

The excitation of surface plasmon polaritons (SPPs) and its association with extraordinary optical transmission (EOT) has been presented in this report.. The 1-dimensional periodic grating structure of copper (Cu) has been designed over the glass substrate in rf-module of COMSOL Multiphysics 5.3a. The geometry was illuminated from glass side with visible-near infrared (400-900nm) electromagnetic spectrum. The 0th order transmission spectra have been investigated to study the maximum value of EOT at different slit widths by taking the period (700nm) and thickness of Cu grating (50nm) constant. Moreover, the near field analysis has been used to investigate the field behavior at desired interface and to verify the results of transmission spectra. It is worth mentioning that the highest value of EOT corresponds to the slit width of 250nm which is affiliated with the strongest plasmonic mode i.e., fundamental plasmonic mode. Such devices are increasingly applicable in sensing, chemical and solar cell industries.

Section: Discussionsupporting

confidence: 91%

Modelling 1-D Copper Grating for Extraordinary Optical Transmission

Ashfaq

et al. 2021

Preprint

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“…Moreover, to quantify the performance of the proposed cell over the entire solar spectrum, we calculated the photocurrent density under the assumption of unity internal quantum efficiency. 42,43 The expression is…”

Section: Resultsmentioning

confidence: 99%

Efficient broadband light absorption in thin-film a-Si solar cell based on double sided hybrid bi-metallic nanogratings

et al. 2020

“…The effect of phase shift at each boundary produced by tangential components is considered using Floquent periodicity in combination with PBCs. These components of EM fields of a model are ensured by continuity boundary conditions (CBCs) which represent the interior boundaries of that model [32][33][34][35][36][37][38]. The incident wave vector, designation boundary to source distance and material properties have significant effect on phase shift.…”

Section: Numerical Modellingmentioning

confidence: 99%

Investigation of Surface Plasmon Polaritons based Gas sensor: Far and Near field Analysis

Afsheen

Khalid

et al. 2021

Preprint

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This research work reports the plasmonic-based biosensing using attenuated total reflection (ATR). A photon beam falls on the metallic film through an angle higher than critical angle of glass. SPPs are produced along the metal/analyte interface. An optimum gold (Au) film has been used to sense the refractive index of analyte lying next to it while utilizing the sensitivity power of electric field of the surface plasmon polaritons (SPPs). Such Nanoplasmonic devices have been designed and optimized utilizing finite element analysis (FEA) in licensed version of COMSOL 5.4, RF module. Reflection spectra have been extracted for far-field analysis, whereas shift in the position of SPP dip has been exploited to compute sensitivity of the device. By controlling the film thickness and angle of light incidence, the sensitivity of the device is enhanced. It is worth mentioning that the spectral range was brought in visible region where most of the practical devices work very well. The sensitivity of 18200 nm/RIU has been achieved for optimum angle and gold film thickness. Hence such devices have various sensing applications in medical diagnostics.