Ermolaev

Data for Main / Ws2 / Ermolaev

import os
import matplotlib.pyplot as plt
import numpy as np
import refidx as ri

plt.style.use("../../doc/refidx.mplstyle")
db = ri.DataBase()
matid = ['main', 'WS2', 'Ermolaev']
mat = db.get_item(matid)
wr = mat.wavelength_range
lamb = np.linspace(*wr, 1000)
index = mat.get_index(lamb)
fig, ax = plt.subplots(2, 1, figsize=(3, 3))
ax[0].plot(lamb, index.real, "-", color="#aa0044")
ax[1].plot(lamb, index.imag, "-", color="#6886b3")
ax[0].set_xlabel(r"Wavelength ($\rm μm$)")
ax[1].set_xlabel(r"Wavelength ($\rm μm$)")
ax[0].set_ylabel(r"$n^{\prime}$")
ax[1].set_ylabel(r"$n^{\prime\prime}$")
plt.suptitle(mat)
mat.print_info(
    html=True,
    tmp_dir=os.path.join("..","..", "doc", "auto_gallery","WS2"),
    filename="out_main_WS2_Ermolaev.html",
)

Comments

Optical constants of monolayer WS₂ were measured by spectroscopic ellipsometry in the spectral range 365‑1700 nm. WS₂ samples were grown on sapphire by atmospheric pressure chemical vapor deposition and then transferred on silicon wafers covered by 295 nm SiO₂. Tauc–Lorentz oscillators were used in ellipsometry model to describe the optical response of excitons.

References

G. A. Ermolaev, D. I. Yakubovsky, Yu. V. Stebunov, A. V. Arsenin, V. S. Volkov. Spectral ellipsometry of monolayer transition metal dichalcogenides: Analysis of excitonic peaks in dispersion, J. Vac. Sci. Technol. B 38, 014002 (2020) (Numerical data kindly provided by Georgy Ermolaev)

Estimated memory usage: 225 MB