Hosseininejad, S.; Alarcon, E.; Komjani, N.; Abadal, S.; Lemme, M.; Bolívar, P.; Albert Cabellos-Aparicio Nano communication networks Vol. 12, p. 1-9 DOI: 10.1016/j.nancom.2017.03.002 Data de publicació: 2017-06-01 Article en revista
Graphene is a unique material for the implementation of terahertz antennas due to extraordinary properties of the resulting devices, such as tunability and compactness. Existing graphene antennas are based on pure plasmonic structures, which are compact but show moderate to high losses. To achieve higher efficiency with low cost, one can apply the theory behind dielectric resonator antennas widely used in millimeter-wave systems. This paper presents the concept of hybridization of surface plasmon and dielectric wave modes. Then, via an analysis of one-dimensional structures, a comparison of the potential capabilities of pure and hybrid plasmonic antennas is performed from the perspectives of radiation efficiency, tunability, and miniaturization. Additionally, the impact of the quality of graphene upon the performance of the compared structures is evaluated. On the one hand, results show that hybrid structures deliver high gain with moderate miniaturization and tunability, rendering them suitable for applications requiring a delicate balance between the three aspects. On the other hand, pure plasmonic structures can provide higher miniaturization and tunability, yet with low efficiency, suggesting their use for application domains with high flexibility requirements or stringent physical constraints.
Mestres, A.; Abadal, S.; Llatser, I.; Alarcon, E.; Lee, H.; Albert Cabellos-Aparicio Nano communication networks Vol. 9, p. 1-6 DOI: 10.1016/j.nancom.2016.05.002 Data de publicació: 2016-09-01 Article en revista
Communications are becoming the bottleneck in the performance of Chip Multiprocessor (CMP). To address this issue, the use of wireless communications within a chip has been proposed, since they offer a low latency among nodes and high reconfigurability. The chip scenario has the particularity that is static, and the multipath can be known a priori. Within this context, we propose in this paper a simple yet very efficient modulation technique, based on Impulse Radio-On–Off-Keying (IR-OOK), which significantly optimizes the performance in Wireless Network-on-Chip (WNoC) as well as off-chip scenarios. This technique is based on interspersing information pulses among the reflected pulses in order to reduce the time between pulses, thus increasing the data rate. We prove that the final data rate can be considerably increased without increasing the hardware complexity of the transceiver.
Garralda, N.; Llatser, I.; Albert Cabellos-Aparicio; Alarcon, E.; Pierobon, M. Nano communication networks Vol. 2, num. 4, p. 196-204 DOI: 10.1016/j.nancom.2011.07.00 Data de publicació: 2011-12 Article en revista