Manipulating infrared photons using plasmons in transparent graphene superlattices

Manipulating infrared photons using plasmons in transparent graphene superlattices

| Hugen Yan, Xuesong Li, Bhupesh Chandra, George Tulevski, Yanqing Wu, Marcus Freitag, Wenjuan Zhu, Phaedon Avouris*, and Fengnian Xia*
This paper demonstrates the manipulation of infrared photons using plasmons in transparent graphene superlattices. The superlattices are formed by alternating wafer-scale graphene sheets and thin insulating layers, followed by patterning into 3D photonic-crystal-like structures. The collective oscillations of Dirac fermions in these superlattices exhibit nonclassical behavior, with the plasmonic resonance frequency and magnitude strongly enhanced compared to single-layer graphene. This enhancement allows for the construction of tunable far-infrared notch filters and terahertz linear polarizers, as well as an effective electromagnetic radiation shield. The study reveals that the massless nature of Dirac fermions in graphene leads to unique plasmon behavior, which is not observed in conventional 2-DEG superlattices. The results open new avenues for the realization of mid- and far-infrared photonic devices, such as detectors, modulators, and 3D meta-material systems.This paper demonstrates the manipulation of infrared photons using plasmons in transparent graphene superlattices. The superlattices are formed by alternating wafer-scale graphene sheets and thin insulating layers, followed by patterning into 3D photonic-crystal-like structures. The collective oscillations of Dirac fermions in these superlattices exhibit nonclassical behavior, with the plasmonic resonance frequency and magnitude strongly enhanced compared to single-layer graphene. This enhancement allows for the construction of tunable far-infrared notch filters and terahertz linear polarizers, as well as an effective electromagnetic radiation shield. The study reveals that the massless nature of Dirac fermions in graphene leads to unique plasmon behavior, which is not observed in conventional 2-DEG superlattices. The results open new avenues for the realization of mid- and far-infrared photonic devices, such as detectors, modulators, and 3D meta-material systems.
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[slides] Tunable infrared plasmonic devices using graphene%2Finsulator stacks. | StudySpace