An array of 400 nanolithographic Yagi-Uda antennas on a metal-semiconductor-metal rectifier photodetector demonstrates control of wavelength selectivity and directivity. The nanoantenna array response is obtained using a direct electrical measurement approach. Resonances in rectified photocurrent are detected at the incident electromagnetic radiation of free-space wavelengths 1110 nm and 1690 nm, corresponding to scaled effective wavelengths of 388 nm and 776 nm, respectively. The scaling is consistent with a theory based on plasmonic effects in nanoscale devices at optical frequencies, and the two resonant wavelength modes are found to match at, respectively, full-wavelength and half-wavelength operation of the detector dipole element. Quantum efficiencies are estimated as 5.1% and 3.1% at 1110 nm and 1690 nm wavelengths, respectively, representing a fourfold increase over a device lacking the antenna array.An array of 400 nanolithographic Yagi-Uda antennas on a metal-semiconductor-metal rectifier photodetector demonstrates control of wavelength selectivity and directivity. The nanoantenna array response is obtained using a direct electrical measurement approach. Resonances in rectified photocurrent are detected at the incident electromagnetic radiation of free-space wavelengths 1110 nm and 1690 nm, corresponding to scaled effective wavelengths of 388 nm and 776 nm, respectively. The scaling is consistent with a theory based on plasmonic effects in nanoscale devices at optical frequencies, and the two resonant wavelength modes are found to match at, respectively, full-wavelength and half-wavelength operation of the detector dipole element. Quantum efficiencies are estimated as 5.1% and 3.1% at 1110 nm and 1690 nm wavelengths, respectively, representing a fourfold increase over a device lacking the antenna array.

中文翻译：

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Yagi-Uda 纳米天线增强型金属-半导体-金属光电探测器

金属-半导体-金属整流器光电探测器上的 400 个纳米光刻 Yagi-Uda 天线阵列展示了对波长选择性和方向性的控制。纳米天线阵列响应是使用直接电测量方法获得的。在自由空间波长 1110 nm 和 1690 nm 的入射电磁辐射处检测到整流光电流中的共振，分别对应于 388 nm 和 776 nm 的缩放有效波长。该缩放与基于光频率下纳米级器件中等离子体效应的理论一致，并且发现两种谐振波长模式分别在检测器偶极子元件的全波长和半波长操作处匹配。在 1110 nm 和 1690 nm 波长处估计量子效率分别为 5.1% 和 3.1%，比没有天线阵列的设备增加了四倍。金属-半导体-金属整流器光电探测器上的 400 个纳米光刻 Yagi-Uda 天线阵列展示了对波长选择性和方向性的控制。纳米天线阵列响应是使用直接电测量方法获得的。在自由空间波长 1110 nm 和 1690 nm 的入射电磁辐射处检测到整流光电流中的共振，分别对应于 388 nm 和 776 nm 的缩放有效波长。该缩放与基于光频率下纳米级器件中等离子体效应的理论一致，并且发现两种谐振波长模式分别在检测器偶极子元件的全波长和半波长操作处匹配。