READ ME File For 'Effect of scattering loss on optimization of waveguide enhanced Raman spectroscopy '

Dataset DOI: https://doi.org/10.5258/SOTON/D2452

ReadMe Author: Zhen Liu*, Mohamed A. Ettabib, James S. Wilkinson, Michalis N. Zervas , University of Southampton

This dataset supports the publication:
Mohamed A. Ettabib, James S. Wilkinson, Michalis N. Zervas
Effect of scattering loss on optimization of waveguide enhanced Raman spectroscopy
IEEE Journal of Lightwave Technology
DOI:10.1109/JLT.2023.3337390



Description:
The excel file contains all experimental and theoretical data used for generating Fig.2 to Fig.8

The figures are as follows:

Fig 2. Excitation and waveguide coupling for a dipole on the cladding-core interface; (a) Normalized squared electric field at the core-cladding surface. (b) Signal capture efficiency in different modes for horizontal dipole. (c) Signal capture efficiency in different modes for vertical dipole. 

Fig 3. The propagation loss coefficient is plotted as a function of core thickness and correlation length for (a) TE0 mode and (b) TM0 mode. The surface roughness RMS amplitude is 1nm. The red lines mark the thickness that maximizes the surface modal field. (c) loss coefficient for the first three modes as a function of thickness with correlation length fixed at 180nm. The dot-dash line corresponding to the right y-axis is calculated by the widely used Payne¡¯s model. (d) The scattering loss from the film on S_i substrate with a 2 ¦Ìm oxidized layer in between.

Fig 4. Measured loss coefficient and comparison with the theoretical value for different modes. The Theoretical value is calculated by assuming the RMS, ¦Ò, is 1nm. The measured experimental loss coefficient is normalized to the mean square of the RMS amplitude, ¦Ò^2.

Fig 5. FOM calculations for forward collection as a function of core thickness and waveguide length for TE_0 pumping and signal collected as (a) TE_0, (b) TE_1, (c) TE_2 and (d) TM_0, (e) TM_1, (f) TM_2.  

Fig 6. FOM calculations for forward collection as a function of core thickness and waveguide length for TM_0 pumping and signal collected as (a) TE_0, (b) TE_1, (c) TE_2 and (d) TM_0, (e) TM_1, (f) TM_2.  

Fig 7. Total forward-collection FOM for different pumping polarization and modes. The pumping is in (a) TE_0, (b) TE_1, (c) TE_2 and (d) TM_0, (e) TM_1, (f) TM_2 polarization, for forward collection.

Fig 8. Total backward-collection FOM for different pumping polarization and modes. The pumping is in (a) TE_0, (b) TE_1, (c) TE_2 and (d) TM_0, (e) TM_1, (f) TM_2 polarization, for backward collection. 


Date of data collection June 2020 to August 2022

Information about geographic location of data collection: Southampton, UK

Licence: CC-BY

Related projects:
Flexible Raman biosensing platform for low-cost health diagnostics (UK Engineering and Physical Sciences Research Council (EPSRC), Grant Number EP/R011230/1.)


Date that the file was created: Nov., 2022