Superconducting LED

Diarienummer 2015-04928
Koordinator KUNGLIGA TEKNISKA HÖGSKOLAN - Skolan för teknikvetenskap
Bidrag från Vinnova 1 799 695 kronor
Projektets löptid april 2016 - juni 2018
Status Pågående

Syfte och mål

Entangled photon pairs play an important role in quantum information science. Yet to date, there is no efficient, on demand source of entangled photons. Here we aim to develop an electrically driven, on demand, entangled photon source based on a nanowire light emitting diode (LED) with superconducting electrical leads. The device will convert cooper pairs to entangled photons, ultimately linking the field of superconductivity with that of optically active semiconductors.

Förväntade effekter och resultat

Entangled photon pairs play an important role in quantum information science. The superconducting LED will fulfil the current need for an efficient, on demand source of entangled photons. More fundamentally, it will integrate the field of superconductivity with that of optically active semiconductors. Likewise, efficient single-photon detection at mid-IR would open new development perspectives in a broad range of applications.

Planerat upplägg och genomförande

We will fabricate the superconducting LED and single photon detectors including e-beam lithography, thin film deposition, and etching. Scanning-probe measurements of surface electrical potential will be used to pinpoint PN junctions in a nanowire. Superconducting contacts will be placed within ~100nm of the junction. We will use Micro-luminescence at cryogenic temperatures to characterize emission from the LED and, finally, detect single photons in the mid-IR and study their correlations.

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