Tunable terahertz frequency comb generation using time-dependent graphene sheets
Artikel i vetenskaplig tidskrift, 2015

We investigate the interaction between electromagnetic pulses and two-dimensional current sheets whose conductivity is controlled as a function of time by the generation of photocarriers, and we discuss its applicability to tunable frequency comb generation. To this aim, we develop an analytical model that permits the calculation of the scattered waves off a thin sheet with time-dependent, dispersive sheet conductivity. We evaluate the transmitted spectrum as a function of the dispersive behavior and the modulation frequency of the number of photocarriers. We conclude that such active materials, e.g., time-dependent graphene sheets, open up the possibility to manipulate the frequency of incident pulses and, hence, could lead to highly tunable, miniaturized frequency comb generation.

frequency combs

graphene

tunable metamaterials

Författare

Vincent Ginis

Philippe Tassin

Chalmers, Teknisk fysik, Kondenserade materiens teori

Thomas Koschny

Costas M. Soukoulis

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 91 161403(R)-

Styrkeområden

Nanovetenskap och nanoteknik

Fundament

Grundläggande vetenskaper

Ämneskategorier

Atom- och molekylfysik och optik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.91.161403