Plasmonic Antireflection Coating for Photoconductive Terahertz Generation

被引：32
|
作者：
Fesharaki, Faezeh [1 ]
Jooshesh, Afshin [1 ]
Bahrami-Yekta, Vahid [1 ]
Mahtab, Mahsa [1 ]
Tiedje, Tom [1 ]
Darcie, Thomas E. [1 ]
Gordon, Reuven [1 ]
机构：
[1] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8P 5C2, Canada
来源：
ACS PHOTONICS | 2017年 / 4卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
antireflection; nanoantenna; photoconductive; plasmonic; terahertz; TEMPERATURE-GROWN GAAS; RADIATION; ANTENNAS; RESONATORS; EMISSION;
D O I：
10.1021/acsphotonics.7b00410
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Plasmon-enhanced photoconductive antennas allow for improved performance, particularly in below-band-gap absorption devices using low-temperature-grown GaAs. Here we design the plasmonic nanostructures to act as antireflection coatings as well, achieving below 10% reflection at 1570 nm wavelength in an optimized device. Quantitative agreement is seen between experiment and theory. Terahertz emission field amplitudes demonstrate 18 times enhancement compared to that of a conventional terahertz photoconductive antenna on the same substrate.
引用
收藏
页码：1350 / 1354
页数：5
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