In this paper, an optimized four-nanowire rhombic nanoantenna (RNA) is proposed and numerically analyzed in terms of directivity and efficiency. The suggested design achieves a directivity of 23.4 with 84.5% radiation efficiency at a wavelength of 1550 nm. Further, the suggested nanoantenna (NA) design offers a high gain of 18.5 with an enhancement of 172%, compared to the previously reported plasmonic horn NA. Additionally, the wireless transmission power of the nanolink based on the optimized rhombic design is analyzed. The numerical results reveal that the RNA enjoys a much lower loss by 32 dB and 12 dB, respectively, when compared to the dipole and plasmonic horn NAs. Moreover, the reported design has broadband operation features over the optical C-band range, making it a promising candidate for applications related to optical communications nanochips.

中文翻译：

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用于光学无线通信系统的宽带定向菱形纳米天线

本文提出了一种优化的四纳米线菱形纳米天线（RNA），并在方向性和效率方面进行了数值分析。建议的设计在1550 nm的波长下具有23.4的方向性和84.5％的辐射效率。此外，与先前报道的等离子喇叭NA相比，建议的纳米天线（NA）设计可提供18.5的高增益和172％的增强。此外，分析了基于优化菱形设计的纳米链接的无线传输功率。数值结果表明，与偶极子和等离激元号角NA相比，RNA的损耗分别低32 dB和12 dB。而且，报告的设计具有在光学C波段范围内的宽带运行特性，