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GPI Anchoring of Proteins in the ER Membrane

GPI Anchoring of Proteins in the ER Membrane

Corrientes impulsadas por el campo de luz en grafeno

Takuya Higuchi¹, Christian Heide¹, Konrad Ullmann²

¹Laser Physics, Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudtstrasse 1, D-91058 Erlangen, Germany.

|September 28, 2017

Resumen

Este resumen es generado por máquina.

Los investigadores demuestran el control del campo de luz de los electrones en el grafeno, observando cambios de corriente de precisión de un segundo. Esto revela una transición a las interacciones de campo fuerte, lo que permite una nueva electrónica petahertz y imágenes de estructura de banda.

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Área de la Ciencia:

La óptica cuántica
Física de la materia condensada
Ciencias de los materiales

Sus antecedentes:

El control de la dinámica de los electrones con campos de luz es crucial para los fenómenos ultrarrápidos.
Las interacciones luz-materia de campo fuerte están bien estudiadas en dieléctricos, pero menos en conductores debido al cribado.
El grafeno ofrece propiedades únicas como la respuesta de banda ancha y la detección débil, lo que lo hace ideal para estudiar el control del campo de luz en los conductores.

Objetivo del estudio:

Para investigar la dinámica de los electrones impulsada por el campo de luz en el grafeno monocapa.
Para explorar el control de las corrientes de electrones utilizando la forma de onda del campo eléctrico de los pulsos láser.
Comprender la transición de los regímenes de interacción de materia ligera de campo débil a campo fuerte en el grafeno.

Principales métodos:

Irradiación de grafeno monocapa con pulsos láser de dos ciclos.
Medición de la sensibilidad de corriente inducida a la fase de envoltura portadora (CEP) de los pulsos láser.
Análisis de la inversión de corriente en función de la amplitud del campo de conducción.

Principales resultados:

Sensibilidad de la corriente inducida a la forma de onda del campo eléctrico láser (CEP).
Observación de una inversión de la dirección de la corriente a ~2 V/nm, indicando una transición al régimen de campo fuerte.
Demostración de que la interferencia subóptica de Landau-Zener-Stückelberg gobierna la dinámica de los electrones en el régimen de campo fuerte, controlable por polarización láser.

Conclusiones:

El grafeno monocapa permite el control del campo de luz de la dinámica de los electrones en escalas de tiempo de ciclo subóptico.
Los fenómenos observados se rigen por efectos de interferencia cuántica coherentes.
Estos hallazgos allanan el camino para aplicaciones en tomografía de estructura de banda y electrónica petahertz impulsada por campo de luz.