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

页码：1350 / 1354

页数：5

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