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Quantum Dot Infrared Photodetector

Interactive quantum-dot infrared photodetector (QDIP) simulator: tune dot size, incident IR wavelength, bias voltage and temperature to see intersubband photon absorption, normal-incidence coupling and thermionic dark current compete for the measured photocurrent.

Materials Science3DAdvanced60 FPS📱 Mobile-adapted⇄ 2D version

Details

CategoryMaterials Science

RenderingThree.js · WebGL

DifficultyAdvanced

Target FPS60

ControlsDot diameter and incident IR wavelength sliders sweep the intersubband absorption resonance; bias voltage slider tilts the band to set the tunneling escape probability that converts absorbed photons into photocurrent; temperature slider drives thermionic dark current; Normal/45° incidence toggle compares coupling geometries.

quantum dotsinfrared detectorQDIPintersubband transitionsemiconductor physicsdark current

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Self-assembled InAs quantum dots embedded in a GaAs barrier confine electrons in all three dimensions, quantizing an intersubband transition tunable by dot size into the mid/long-wave infrared. This simulator renders a live dot array under an IR beam: tune dot diameter and photon wavelength to sweep the absorption resonance, tune bias to open the tunneling escape route that turns an excited electron into photocurrent, and tune temperature to watch thermionic dark current compete with the photosignal — the same trade-off that lets real QDIPs run warmer than quantum-well detectors while still coupling light at normal incidence.

⚙ Under the hood

Tune quantum dot size, incident infrared wavelength, bias voltage and temperature to watch intersubband photon absorption compete with thermionic dark current, and see why 3D confinement lets these detectors couple light at normal incidence unlike quantum-well IR photodetectors.

quantum dotsinfrared detectorQDIPintersubband transitionsemiconductor physicsdark current

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install