Theoretical Analysis of a Super-Mode Waveguide and Design of a Complementary Triangular Hybrid Plasmonic Nano-Antenna

Abstract

The characteristics of a super-mode waveguide-fed nano-antenna composed of a complementary triangular hybrid plasmonic radiation part have been investigated by two methods of finite element and finite-difference time-domain. Also, a symmetric hybrid plasmonic waveguide (SHPW) has been studied theoretically and numerically to analyze short-and longrange fundamental TM super-modes (TMSR and TMLR) that excite the nano-antenna. The obtained propagation length and figure of merit at 193.5 THz are 150.6 µm (1.27 µm) and 691.77 (16.94) for TMLR (TMSR) super-mode, respectively, which confirm the inevitable loss-confinement trade-off of SHPW. These super-modes cause the nano-antenna to have horizontal and bidirectional radiation patterns due to the existence of the in-phase and out-of phase super-modes. The obtained directivities and efficiencies are 9.34 dBi (7.01 dBi) and 96.82% (9.66%) for TMLR (TMSR) super-mode, respectively, at 193.5 THz. Moreover, the horizontal and bidirectional radiation patterns are appropriate for on-chip wireless links with the quality factor of 69.18 and target tracking systems, respectively. The performance of a single row array of nano-antenna on improving the directivity and efficiency has been studied. The proposed SHPW-fed nano-antenna is quite tolerant to practical fabrication errors and compatible with lift-off and electron beam lithography fabrication processes.

Theoretical analysis of a graphene quantum well hybrid plasmonic waveguide to design an inter/intra-chip nano-antenna

“…HPWs incorporate the advantages of both dielectric and plasmonic waveguides to break the diffraction limit, achieve tight light confinement and have low-loss lightwave guiding [9]. The unavoidable trade-off between the propagation loss and strong light concentration leads the researchers to propose the perceived diversity difference in geometrical structures [10] which can be categorized based on their capability of performing diversity of functions such as guiding [11], modulation [12], filtering [13], and radiating [14][15][16][17][18][19][20][21].…”

“…These antennas transmit, receive, emit and control the light at the subwavelength scale [22]. However, the operating master keys and axiom of hybrid plasmonic and RF antennas are totally different due to the excitation of surface plasmon polaritons (SPPs) at metal-dielectric interface [21,22]. Moreover, hybrid plasmonic waveguide antennas (HPWAs) not only decrease the effect of intrinsic loss in comparison to plasmonic antennas, but also they can control the light similar to RF antennas due to increasing the light confinement in the low refractive index region [14][15][16][17][18][19][20][21][22].…”

Design and Analysis of a Graphene Based Slotted Bowtie Optical Plasmonic Nanoantenna

“…The formation of an optical wireless communication link is possible once the radiating portions of the optical multibeam nanoantennas can accept an optical signal in-plane and to emanate multiple beams simultaneously towards several directions in the free space using the reciprocity theorem [62]; graphene layers regulated by electrostatic gate bias voltage are sandwiched by other material layers such that more directive radiation patterns are apparent [23][24][25][26][27][28][29][30]. By applying a group of plasmonic multibeam optical nanoantennas as an intra or inter on-chip wireless nanolink in the photonic integrated circuits (PICs) [33,34], the transmission of data from one device located at one chip to other devices at several layers is inevitable [35,36].…”

Dynamic beam-steering of graphene-based terahertz cross Yagi–Uda antenna with a theoretical approach

“…These studies have focused on various types of PAs such as W-, V-and T-shaped [3,7,11,12], circular [13], bow-tie [14], Vivaldi [15], horn [16], helical [17] and so on, to increase the efficiency and execute the above-mentioned applications. However, the proposed antennas such as dipole [18], bow-tie, spiral [19], and trimmers [20] are mostly appropriate for near-field applications, and suffer from poor far-field specifications in comparison to the RF antennas [21]. Therefore, the Yagi-Uda antenna is apt for improving the far-field radiation pattern characteristics.…”