Tools

Reference tools: unit conversions and calculators.

Energy unit converter Infrared — Near-infrared

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Energy

eV meV µeV

Wavelength

nm µm

Wavenumber

cm⁻¹

Frequency

THz GHz

Temperature

Time

fs period ps period ps ħ/E

Magnetic field calculator not a universal conversion — set g and m*

Material

Field B (T) g-factor Effective mass m* / m₀

Quantity	Energy	Temperature	Frequency
Zeeman splitting $\|g\|\,\mu_{\mathrm{B}} B$	0.0254689 meV	0.295554 K	6.15835 GHz
Cyclotron energy $\hbar\omega_{\mathrm{c}}$	1.72788 meV	20.0512 K	0.417798 THz

Length & density	Value
Magnetic length $l_{\mathrm{B}} = \sqrt{\hbar/eB}$	25.6556 nm
Landau degeneracy $eB/h$ (density at $\nu = 1$ )	2.4180e+10 cm⁻²

Relations

E = \frac{hc}{\lambda}

photon energy

\nu = \frac{c}{\lambda}

frequency

\tilde{\nu} = \frac{1}{\lambda}

wavenumber

E = k_{\mathrm{B}} T

thermal energy

T_{\mathrm{per}} = \frac{1}{\nu}

period

\tau = \frac{\hbar}{\Delta E}

lifetime

E_{\mathrm{Z}} = |g|\,\mu_{\mathrm{B}} B

Zeeman splitting

\hbar\omega_{\mathrm{c}} = \frac{\hbar e B}{m^{*}}

cyclotron energy

l_{\mathrm{B}} = \sqrt{\frac{\hbar}{eB}}

magnetic length

n_{\mathrm{B}} = \frac{eB}{h}

Landau degeneracy