Dataset Title: 
QCL Dataset, 10 Layer Structure, Tolerance [-5, +20] Å, Electric Field [10,10,150] kV/cm

Author: 
Andres Correa Hernandez
Princeton University
andresch@princeton.edu

Data Collected:
2023-07-14 - 2023-07-18
Princeton, NJ, USA, 08540

License: 
CC-BY 4.0

Keywords:
Quantum Cascade Laser, Mid-Infrared, Machine Learning, Figure of Merit

File:
QCL-layer_10-4rep-rand-m5d5p20A-efield_10-10-150-v22-dataset.csv

Format:
Quantum Cascade Laser structure, 10 layers, 4 period repetitions, -5 to +20 Angstrom range by 5 Angstrom increments, electric field sweep of 10 to 150 kV/cm by 10 kV/cm increments.

Description:
A dataset of 2400 quantum cascade structures at 15 electric field iterations, for a total of 36000 unique designs. The structures are generated by randomly altering a starting 10-layer design of alternating Al0.48In0.52As barrier material and In0.53Ga0.47As well material, with layer thickness sequence of 9/57/11/54/12/45/25/34/14/33 Angstroms (starting with well material). The random tolerance range is from -5 to +20 Angstroms in 5 Angstrom increments. The laser transition Figure of Merit, among other quantities of interest, is identified for each design using a method found in:

A. C. Hernandez, M. Lyu and C. F. Gmachl, "Generating Quantum Cascade Laser Datasets for Applications in Machine Learning," 2022 IEEE Photonics Society Summer Topicals Meeting Series (SUM), 2022, pp. 1-2, doi: 10.1109/SUM53465.2022.9858281

Created:
2023-07-24

Version:
version 22 of laser transition code

Variables:
26

Rows: 
36000

Variable List: 
L01 - L10: thickness of layer 01 through layer 10 in values of Angstroms (A)
efield: electric field in kilovolts per centimeter (kV/cm)
all states: total number of eigenstates calculated by ErwinJr2
selected: selected number of states used to identify the laser transition
lower: index of the lower electronic state for the laser transition
E_lower: energy of the lower state in millielectronvolts (meV)
upper: index of the upper electronic state for the laser transition
E_upper: energy of the upper state in meV
Ediff: energy difference between upper and lower states in meV
z: dipole matrix element of the state-pair in Angstroms (A)
t_eff: effective scattering time in picoseconds (ps)
t_ul: scattering time of the upper and lower state-pair interaction (ps)
t_u: scattering time of the upper state (ps)
t_l: scattering time of the lower state (ps)
fom: old figure of merit value not multiplied by energy difference (ps A^2)
fom*: new figure of merit value (eV ps A^2)
g: gain coefficient (cm/kA)