Bi₂Te₃ (Bismuth telluride)

Semiconductors and photonic platforms

1 dataset, together covering 0.45–1.5 µm. Default: Ermolaev et al. 2024: CVD flakes; n,k 0.450–1.50 µm.

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Datasets

Thin film

Ermolaev et al. 2024: CVD flakes; n,k 0.450–1.50 µm n,k 0.45–1.5 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Bi2Te3 (Bismuth telluride): Ermolaev et al. 2024: CVD flakes; n,k 0.450–1.50 µm
bi2te3 = ls.fetch_refractiveindex("main", "Bi2Te3", "Ermolaev", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(bi2te3.range_nm)  # (450, 1500) nm
eps = bi2te3.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_e274b51d2081/lightsmith"
bi2te3 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(bi2te3.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (bi2te3/ermolaev-2024).

# ... load bi2te3 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=bi2te3)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=450, stop_nm=1000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

About Bi2Te3 (Bismuth telluride)

Bi₂Te₃, or bismuth telluride, is a layered compound with a rhombohedral crystal structure, renowned for its thermoelectric properties and significant role in energy conversion applications. It is a topological insulator that exhibits unique electronic states on its surface while being insulating in its bulk. In optics, Bi₂Te₃ is recognized for its high refractive index and strong optical anisotropy, stemming from its layered structure. The material's narrow bandgap and excellent carrier mobility make it suitable for infrared photodetectors, modulators, and other optoelectronic devices. Bi₂Te₃ can be synthesized using techniques such as zone melting, Bridgman-Stockbarger, and chemical vapor deposition (CVD). However, it is sensitive to environmental conditions, necessitating protective measures to preserve its optical and electronic properties. This material continues to be a subject of intense research for applications in thermoelectrics, photonics, and quantum technology.

Other names: Bismuth telluride, Bismuth(III) telluride, Dibismuth tritelluride, Telluroxobismuth, Tellanylidenebismuth

API: /v1/materials/mat_be582ea186f0 · slug bi2te3