Optical excited photoconductive antennas are a central technology for the Terahertz (THz) domain, crucial for both emitting and detecting THz radiation. This work proposes and experimentally realises a new approach in digitated photoconductive antennas (d-PCAs) based on a single digitated high resistivity metal contact with integrated resistances as voltage dividers. This permits a uniform applied electric field over a large surface area and a single step device processing procedure, simplifying the device realisation. This concept is further combined with digitated plasmonic nano-antennas that permits to enhance the light-matter interaction. Through femtosecond optical excitation of such structures, THz pulses can be generated efficiently through this device. Further, for the plasmonic d-PCA, the detected THz electric field of the device shows the effect of polarisation of the incident IR beam, highlighting the role of the nanostructured digitated contacts. This work is supported by electromagnetic simulations showing the optical and THz response of this new type of photoconductive antenna with integrated resistances.

中文翻译：

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基于单个高电阻率金属和纳米等离子体电极的大面积太赫兹数字光电导天线

光激光电导天线是太赫兹 (THz) 领域的一项核心技术，对于发射和检测太赫兹辐射至关重要。这项工作提出并通过实验实现了一种数字化光电导天线（d-PCA）的新方法，该方法基于单个数字化高电阻率金属触点，并带有集成电阻作为分压器。这允许在大表面积上均匀施加电场和单步器件处理过程，从而简化器件实现。这一概念进一步与数字化等离子体纳米天线相结合，可以增强光与物质的相互作用。通过飞秒光学激发此类结构，可以通过该设备有效地产生太赫兹脉冲。此外，对于等离子体 d-PCA，检测到的设备太赫兹电场显示了入射红外光束的偏振效应，突出了纳米结构数字化触点的作用。这项工作得到了电磁仿真的支持，电磁仿真显示了这种新型集成电阻光电导天线的光学和太赫兹响应。