The physics of devices, with the numbers.

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25.9meV

The thermal noise every transistor has to beat.

Electronics

1.12eV

Silicon’s band gap. Lower the barrier and current flows.

Semiconductors

0.80eV

Silicon is transparent at 1550 nm and absorbs green.

Photonics

One energy scale, four subjects.

CODATA 2018, materials library,
10 meV100 meV1 eV10 eV20 eV17.9 meVkT ln 2, Landauer limit25.9 meVkT at 300 K0.80 eV1550 nm photon1.12 eVSi band gap1.42 eV GaAsvisible light1.65 to 3.26 eV3.62 eVper e-h pair in Si13.6 eVhydrogen ionisation

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