READ ME File For 'Release and Re-Capture Experiment Data' Dataset Dataset DOI: 10.5258/SOTON/D2898 Date that the file was created: 22/01/2024 ------------------- GENERAL INFORMATION ------------------- ReadMe Author: Jakub Wardak, University of Southampton [https://orcid.org/0000-0003-2348-1989] Date of data collection: 21/07/2023 Information about geographic location of data collection: Collected at the University of Southampton, Building 46/2033, UK Project Funder:Leverhulme Trust (RPG-2022-57) -------------------------- SHARING/ACCESS INFORMATION -------------------------- Licenses/restrictions placed on the data, or limitations of reuse: CC BY License Recommended citation for the data: This dataset supports the publication: AUTHORS: Wardak, J; Georgescu, T; Gasbarri, G; Belenchia, A; Ulbricht, H. TITLE: Nanoparticle Interferometer by Throw and Catch JOURNAL: Atoms - MDPI PAPER DOI IF KNOWN: TBC Links/relationships to ancillary or related data sets: TBC -------------------- DATA & FILE OVERVIEW -------------------- This dataset contains: README.txt - this file C2_XX_00008.trc - Voltage over time data relating to the signal sent to turn the optical trap off/on (using a function generator) as described in the publication mentioned above. C4_XX_00008.trc - Voltage over time data relating to the signal gathered on a photodetector which measured the particle's motion, simultaenously with the above pulse. Relationship between files, if important for context: Together the files give a full picture of the release and re-capture experiment performed, as detailed in the article mentioned above. Additional related data collected that was not included in the current data package: Additional experiments were conducted with the trap being turned off for varying lengths of time with similar data gathered. -------------------------- METHODOLOGICAL INFORMATION -------------------------- Description of methods used for collection/generation of data: A silicon dioxide nanosphere was trapped in a parabolic mirror trap, very similar to that detailed in 'Vovrosh, J.; Rashid, M.; Hempston, D.; Bateman, J.; Paternostro, M.; Ulbricht, H. Parametric feedback cooling of levitated optomechanics in a parabolic mirror trap. JOSA B 2017, 34, 1421–1428'. The particle was then cooled through the use of a Zurich Instruments lock-in-amplifier which ent a signal to an EOM which modulated the trapping light, therefore realising parametric feedback cooling as described in the reference provided. The particle was trapped at atmospheric pressure and slowly brought down to 1e-5mbar where a square wave pulse was provided to the EOM by a function generator. This had the effect of turning off the trap for 50 microseconds. This pulse was recorded by a LeCroy oscilloscope and is provided in C2_XX_00008.trc, the signal from the particle was collected by a photodetector and also saved on the same oscilloscope and is provided in C4_XX_00008.trc. Some more details of the data collection are specified in the above publication. Methods for processing the data: We provide the data files as saved by the LeCroy oscillocope that was used to view the data as the experiment was ongoing. Software- or Instrument-specific information needed to interpret the data, including software and hardware version numbers: A convenient way to use the data is to install Ashley Setter's optoanalysis module in Python, available at https://github.com/AshleySetter/optoanalysis. The load_data(filename) function will create a struct within which the voltage and time values can be found. This applies to both .trc files in this dataset. Standards and calibration information, if appropriate: N/A Environmental/experimental conditions: Data was gathered in a standarad university laboratory at room temperature, the experiment was conducted within a vacuum chamber at approximately 1e-5mbar. Describe any quality-assurance procedures performed on the data: People involved with sample collection, processing, analysis and/or submission: Jakub Wardak, Tiberius Georgescu -------------------------- DATA-SPECIFIC INFORMATION -------------------------- Number of variables: 2 files which each output one struct when opened as described above. This struct will contain voltage over time values for each. Number of cases/rows: N/A Variable list, defining any abbreviations, units of measure, codes or symbols used: Voltage in volts and time in milliseconds for both files.