README File For "Stable non-volatile phase modulation with antimony-based phase shifter on broadband silicon nitride platform" Dataset DOI: https://doi.org/10.5258/SOTON/D3606 Date that the file was created: July 2025 ------------------- GENERAL INFORMATION ------------------- ReadMe Author: Afrooz Shoaa, University of Southampton Date of data collection: 2021–2025 Information about geographic location of data collection: University of Southampton, UK Related projects: This work was supported by the EU projects PlasmoniAC (Grant Agreement ID: 871391), OCTAPUS (Grant Agreement ID: 101070009), and AMBROSIA (Grant Agreement ID: 101093166); the Engineering and Physical Sciences Research Council (EPSRC) studentship [Ref: 2897892] and [EP/W022931/1]; the Spanish Ministry of Science and Innovation (MCIN) / State Research Agency (AEI) [10.13039/501100011033]; and the European Union “NextGenerationEU/PRTR” under the projects RYC2023-043256-I and FJC2020-042823-I. -------------------------- SHARING/ACCESS INFORMATION -------------------------- Licenses/restrictions placed on the data, or limitations of reuse: CC BY – Data can be reused with attribution. Recommended citation for the data: Shoaa, A., Dominguez Bucio, T., Luo, Q., Banakar, M., Johnson, I., Sandell, E., Gardes, F., Zeimpekis, I., Faneca, J. (2025). Dataset supporting the paper "Stable non-volatile phase modulation with antimony-based phase shifter on broadband silicon nitride platform". University of Southampton. https://doi.org/10.5258/SOTON/D3606 This dataset supports the publication: AUTHORS: Shoaa et al. TITLE: Stable non-volatile phase modulation with antimony-based phase shifter on broadband silicon nitride platform JOURNAL: Optics express PAPER DOI: [Add when available] Links to other publicly accessible locations of the data: N/A Links/relationships to ancillary or related data sets: N/A -------------------- DATA & FILE OVERVIEW -------------------- This dataset contains: An Excel spreadsheet (DOI-DATA_SET.xlsx) with 14 sheets , corresponding to simulation and experimental data used in the manuscript: - Figure 1(c) and 1(d): Lumerical simulation results for geometrical taper optimization (two sheets) - Figure 3(b): Cutback method data showing propagation loss for amorphous vs crystalline states of the PCM, across OPS lengths (20–80 µm) (one sheet) - Figure 3(c): Transmission spectra over three full phase-change cycles (SET and RESET pulses) (Six sheets) - Figure 4(a): Temporal response of the device under SET and RESET pulses (one sheet) - Figure 4(b): Extinction ratio data measured over 7,900 cycles (one sheet) - Figure 5: Demonstration of the microheater's electrical resistance as a function of the number of switching cycles (one sheet) - Figure 6(a) and 6(b): COMSOL temperature profile simulations (two sheets) Relationship between files, if important for context: Each sheet corresponds directly to specific figures in the manuscript. Sheet names match the figure references. Except figure 3(c) which the related Data is organized into six sheets, each corresponding to a specific cycle and pulse type. Additional related data collected that was not included in the current data package: N/A If data was derived from another source, list source: N/A If there are multiple versions of the dataset, list the file updated, when and why update was made: This is the first version. -------------------------- METHODOLOGICAL INFORMATION -------------------------- Description of methods used for collection/generation of data: - Lumerical simulations were used for photonic design and taper geometry optimization. - COMSOL Multiphysics was used to simulate thermal responses in the PCM region. - Experimental data was obtained using standard photonic cutback methods and transmission spectrum recording under applied electrical pulses. - Phase-change cycles (SET and RESET) were driven using programmed electrical pulses and also recorded temporal response of the device under SET and RESET electrical pulses. - I-V resistance measurements. Methods for processing the data: Raw measurements were averaged and normalized. Data for figures were extracted, cleaned, and formatted in Excel and Matlab. Software- or Instrument-specific information needed to interpret the data: Lumerical FDTD and MODE: Used for optical simulations and taper optimization. COMSOL Multiphysics: Used for thermal simulations and temperature profile extraction. Excel and MATLAB: Used to process, analyze, and plot both simulation and experimental data. Agilent 81940A Tunable Laser Source: Provided input light in the 1520–1630 nm wavelength range. Polarization Controller: Used to ensure transverse electric (TE) mode operation. 3D Manual Stage: Enabled precision alignment of the Device Under Test (DUT). Panasonic CAM 06 Camera: Visually monitored the DUT alignment process. Edmund Optics Fiber Illuminator: Provided lighting to assist visual alignment. BNC Model 577 Pulse Generator: Generated two independent electrical pulse profiles for amorphization and crystallization. API 1515 2:1 Combiner: Merged the two pulse channels into a single output signal. Keysight 81634B Power Meter: Measured transmitted optical power after phase transition events. RSDS 1204CFL Oscilloscope: Captured real-time optical output and phase change behaviour. Standards and calibration information, if appropriate: All measurements calibrated using internal lab standards. Environmental/experimental conditions: Room temperature (~22°C) unless otherwise stated. Phase-change device heating controlled electrically. Describe any quality-assurance procedures performed on the data: Each experiment repeated multiple times to ensure reproducibility. Data was reviewed for outliers and consistency. People involved with sample collection, processing, analysis and/or submission: Afrooz Shoaa, Tomas Dominguez Bucio, Qingyang Luo, Mahdi Banakar, Ian Johnson, Edward Sandell, Frederic Gardes, Ioannis Zeimpekis, Javier Faneca. -------------------------- DATA-SPECIFIC INFORMATION -------------------------- Number of variables: Varies per sheet (between 2–4 per dataset) Number of cases/rows: ~7–2650 per sheet Variable list, defining any abbreviations, units of measure, codes or symbols used: Includes wavelength (nm), transmission (dB), time (µs), power (mW), temperature (°C), etc. - OPS: Optical Phase Shifter - PCM: Phase Change Material - SET/RESET: Phase-change programming pulses Missing data codes: None Specialized formats or other abbreviations used: See variable list above