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Wavelength-Scale Stationary-Wave Integrated Fourier Transform Spectrometry: Theoretical Efficiency Analysis.pdf

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Preview of Wavelength-Scale Stationary-Wave Integrated Fourier Transform Spectrometry: Theoretical Efficiency Analysis
🔗 Source: static-content.springer.com
📊 Size: 231 KB
👤 Author: Le Coarer
⬇️ Downloads: 154

Summary

This document provides theoretical insights into the internal efficiency of SWIFTS-based spectrometers, focusing on a continuous medium approach for modeling energy distribution in evanescent fields and attenuation of stationary waves. The interferogram intensity profile is described by an equation representing two-beam interferometry within an absorbing medium, incorporating factors like linear attenuation, waveguide length, effective refractive index, and phase shift due to reflection.

The document divides the intensity into a useful interferometric term (Iint) and a slowly varying function (Isvf), emphasizing the need to minimize Isvf for optimal instrument efficiency. The total detected power is expressed as a combination of these terms, with signal processing aimed at isolating the valuable interferometric component for Fourier transform-based spectral recovery.

SWIFTS efficiency peaks when kL=1, meaning each detector probes 1/N of local power, allowing 74% of input power to contribute to the interferometric signal. The nearfield probe efficiency is modeled using a 2D numerical approach combining Rigorous Coupled Wave Analysis (RCWA) and Perfectly Matched Layer (PML), applied to gold nanowires in a silicon waveguide. Simulations show that these probes scatter about 1.33% of incoming light, aligning closely with the optimal scattering efficiency for embedded gold nanowires within the waveguide's near field.

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Description

theoretical insights into the internal efficiency of wavelength-scale stationary-wave integrated Fourier transform spectrometry (SWIFTS). It discusses factors affecting SWIFTS-based spectrometer performance. Authors from various research institutions contributed to this supplemental information, focusing on enhancing understanding and optimization of SWIFTS technology.

Technical Information

  • File Format: PDF
  • File Size: 231 KB
  • Pages: 3
  • Language: EN
  • Author: Le Coarer
  • Total Downloads: 154
  • Last Updated: 1 day ago

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Wavelength-Scale guideWavelength-Scale tutorialStationary-Wave guideStationary-Wave tutorialIntegrated guideIntegrated tutorialFourier guideFourier tutorialTransform guideTransform tutorialSpectrometry: guideSpectrometry: tutorialTheoretical guideTheoretical tutorialEfficiency guideEfficiency tutorialAnalysis guideAnalysis tutorial

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