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Detector infrarrojo de un solo fotón de unión Josephson

Evan D Walsh1,2, Woochan Jung3, Gil-Ho Lee3,4

  • 1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

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|April 23, 2021
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Resumen
Este resumen es generado por máquina.

Los investigadores demuestran la detección de fotones únicos en el infrarrojo cercano utilizando uniones de grafeno Josephson. Este avance utiliza cuasipartículas inducidas por fotones para la detección sensible, allanando el camino para interconexiones ópticas más rápidas en computadoras superconductoras.

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Área de la Ciencia:

  • La computación cuántica
  • Dispositivos superconductores
  • Nanotecnología

Sus antecedentes:

  • Las uniones de Josephson son dispositivos superconductores vitales para magnetómetros, amplificadores y computadoras cuánticas.
  • Las cuasipartículas, formadas a partir de pares de Cooper rotos, pueden degradar el rendimiento del dispositivo pero también permitir la detección de radiación.

Objetivo del estudio:

  • Para demostrar la detección de fotones individuales en el infrarrojo cercano utilizando uniones Josephson basadas en grafeno.
  • Investigar el papel de las cuasipartículas en el mecanismo de detección de fotones.

Principales métodos:

  • Acoplamiento de fotones de infrarrojo cercano a plasmones de superficie localizados de una unión de Josephson de grafeno.
  • Análisis de las estadísticas de conmutación inducida por fotones de un dispositivo sesgado por corriente.

Principales resultados:

  • Demostración exitosa de la detección de fotones en el infrarrojo cercano.
  • Reveló el papel crítico de las cuasipartículas generadas por fotones en el proceso de detección.

Conclusiones:

  • Las uniones de grafeno Josephson ofrecen una nueva plataforma para la detección de fotones sensibles.
  • Esta tecnología puede permitir interconexiones ópticas de alta velocidad y baja potencia para computación superconductora avanzada.