Kerr nonlinearity and parametric amplification with an Al-InAs superconductor-semiconductor Josephson junction

<h1>Brief description</h1> <p><br>This repository contains data, code, and other materials for "Kerr nonlinearity and parametric amplification with an Al-InAs superconductor-semiconductor Josephson junction". Files are zipped by types (data, fabrication, measurement code and results) and experiments (Kerr nonlinearity measurements and parametric amplifier experiment).</p> <h1><br>Data formats:</h1> <p>.db: database file storing all measured data. QCoDeS version 0.39.1, QCoDeS github repo: https://github.com/microsoft/Qcodes. Please refer to 'plottr' tool to view the database files: https://github.com/toolsforexperiments/plottr . Plottr version: 0.0<br>.gds: GDSII pattern files for Litography<br>.ipynb: ipython notebooks that run measurements<br>.py: python scripts for generating the GDSII patterns or conducting measurements<br>.emz: AWR projects (model and data), AWR design environment version is 22.1<br>others: figures, etc..</p> <h1><br>File structure and instruction:</h1> <p>GDS patterns &lt;&lt; GDS files for simulations and device fabrication<br>&nbsp; &nbsp; 4cavtunable_nocost_Q150-300_top-GND_bot-OP.gds &lt;&lt; the GDS for device B, used in AWR simulation for BBQ model.<br>&nbsp; &nbsp; Distributed_JJFET_sim_v12.gds &lt;&lt; the GDS for device A, used in AWR simulation for BBQ model.<br>&nbsp; &nbsp; Distributed_JJFET_sim_v12.py &lt;&lt; the python script to generate the 'sim' GDS<br>&nbsp; &nbsp; Distributed_JJFET_v12.gds &lt;&lt; the GDS pattern for fabrication (e-beam lithography)<br>&nbsp; &nbsp; Distributed_JJFET_v12.py &lt;&lt; the python script to generate the 'fab' GDS<br>AWR_simulation &lt;&lt; files of microwave simulations<br>&nbsp; &nbsp; Compare_P1db.ipynb &lt;&lt; simulate P1dB of AlOx based JPA and Al-InAs based JPA<br>&nbsp; &nbsp; plots &lt;&lt; Raw plots from Compare_P1db.ipynb<br>&nbsp; &nbsp; 202312 single JJ compression power.emz &lt;&lt; AWR project for simulating P1dB of AlOx based JPA and Al-InAs based JPA<br>&nbsp; &nbsp; extra data &lt;&lt; extra AWR data (user-defined format) to plot the gain versus pump frequency and power for Al-InAs based JPA - AWR tends to run out of system memory, therefore I manually divided the simulation task into small segements, and save data after each small tasks.<br>&nbsp; &nbsp; Series BBQ - device B.emz &lt;&lt; AWR project to derive the BBQ model for device B<br>&nbsp; &nbsp; Series BBQ - device A.emz &lt;&lt; AWR project to derive the BBQ model for device A<br>Code-Kerr-measurement<br>&nbsp; &nbsp; Compute and compare c4c2 &lt;&lt; code that takes the measured Kerr into the c4/c2 ratio&nbsp;<br>&nbsp; &nbsp; Kerr fit device A.ipynb &lt;&lt; code to analyze Kerr of device A, database file needed is jjfeta0425.db<br>&nbsp; &nbsp; Kerr fit device B.ipynb &lt;&lt; code to analyze Kerr of device B, database file needed is 0722.db<br>&nbsp; &nbsp; Data_analysis_IMD.ipynb &lt;&lt; code to analyze Kerr of device B using intermodulation spectroscopy, data needed is Data_IMD<br>&nbsp; &nbsp; Data_analysis_plots &lt;&lt; Raw plots from data analysis codes<br>Code-Parametric_amp<br>&nbsp; &nbsp; Data_acquisition.ipynb &lt;&lt; code to take measurements<br>&nbsp; &nbsp; Data_analysis_parametric_noise_ratio_plot.ipynb &lt;&lt; code for analyzing the noise visibility ratio of the 4WM amp, database files needed are jjfeta0226.db&nbsp;<br>&nbsp; &nbsp; Data_analysis_parametric_amp.ipynb &lt;&lt; code for analyzing the parametric amplification, including gain, bandwidth etc., database files needed are jjfeta0226.db, jjfeta0225.db, jjfeta0223.db, jjfetamp0113-3.db<br>&nbsp; &nbsp; Data_analysis_plots &lt;&lt; Raw plots from data analysis codes<br>Data &lt;&lt; raw data for analysis<br>&nbsp; &nbsp; Data-4WM_parametric_amplifier &lt;&lt; data for the parametric amplifier<br>&nbsp; &nbsp; &nbsp; &nbsp; jjfeta0226.db&nbsp;<br>&nbsp; &nbsp; &nbsp; &nbsp; jjfeta0225.db<br>&nbsp; &nbsp; &nbsp; &nbsp; jjfeta0223.db<br>&nbsp; &nbsp; &nbsp; &nbsp; jjfetamp0113-3.db<br>&nbsp; &nbsp; Data-Kerr_measurement &lt;&lt; data for the Kerr measurement (Stark shift)<br>&nbsp; &nbsp; &nbsp; &nbsp; jjfeta0425.db<br>&nbsp; &nbsp; &nbsp; &nbsp; 0722.db<br>&nbsp; &nbsp; Data_IMD &lt;&lt; data for the Kerr measurement on device B (IMD)</p>