Graphene-Based Multi-Beam Reconfigurable THz Antennas

Tunable graphene antennas for selective enhancement of THz-emission.

In this paper, we will introduce THz graphene antennas that strongly enhance the emission rate of quantum systems at specific frequencies. The tunability of these antennas can be used to selectively enhance individual spectral features. We will show as an example that any weak transition in the spectrum of coronene can become the dominant contribution. This selective and tunable enhancement est...

Tunable Wideband Graphene based Filters in THz Band

In this paper, a procedure for analyzing and designing of tunable wideband band-pass and band-stop graphene based filters in the terahertz band is proposed. These planar wideband plasmonic filters are unique in their kind. With this procedure, it is possible to design filters with the desired functional characteristics in the form of the similar quarter-wavelength resonance stubs. The discontin...

Photo-generated THz antennas

Electromagnetic resonances in conducting structures give rise to the enhancement of local fields and extinction efficiencies. Conducting structures are conventionally fabricated with a fixed geometry that determines their resonant response. Here, we challenge this conventional approach by demonstrating the photo-generation of THz linear antennas on a flat semiconductor layer by the structured o...

Frequency and Beam Reconfigurable Antennas for MMMB Communication Systems

In this paper, four reconfigurable antennas are presented for multi-mode multi-band (MMMB) communication systems. Each antenna is able to reconfigure diverse operational frequency bands or beam directions depending on the states of embedded switches, which are implemented using pin diodes or RF-microelectro-mechanical system (RF-MEMS) switches.

Ultrafast graphene-based broadband THz detector