Enhancement of terahertz radiation from GaP emitters by subwavelength antireflective micropyramid structures

Hu, Xiaokun, Li, Yanfeng, Fang, Fengzhou, Li, Xian, Li, Jiang, Chen, Yunhui, Zhang, Xiaodong, Chai, Lu, Wang, Chingyue, Fedotov, Andrey B. and Zheltikov, Aleksei M. (2013) Enhancement of terahertz radiation from GaP emitters by subwavelength antireflective micropyramid structures. Optics Letters, 38 12: 2053-2055. doi:10.1364/OL.38.002053


Author Hu, Xiaokun
Li, Yanfeng
Fang, Fengzhou
Li, Xian
Li, Jiang
Chen, Yunhui
Zhang, Xiaodong
Chai, Lu
Wang, Chingyue
Fedotov, Andrey B.
Zheltikov, Aleksei M.
Title Enhancement of terahertz radiation from GaP emitters by subwavelength antireflective micropyramid structures
Journal name Optics Letters   Check publisher's open access policy
ISSN 0146-9592
1539-4794
Publication date 2013-06-01
Sub-type Article (original research)
DOI 10.1364/OL.38.002053
Open Access Status Not yet assessed
Volume 38
Issue 12
Start page 2053
End page 2055
Total pages 3
Place of publication Washington, DC, United States
Publisher Optical Society of America
Language eng
Abstract Subwavelength antireflective micropyramid structures, designed by rigorous coupled-wave analysis and fabricated by precision micromachining, are used to enhance the terahertz (THz) radiation output of optical rectification in GaP crystal-based emitters. An average 16% increase in the THz radiation power emitted by a 3 mm GaP crystal is experimentally demonstrated using an antireflective micropyramid grating with a period of 60 μm and a base angle of 55.5°. Optimized pyramidal-frustum gratings are shown to operate as highly efficient antireflective structures within an ultrabroadband range of 0.5-5 THz.
Keyword Anti-reflective
Antireflective structure
Optical rectifications
Rigorous coupled wave analysis
Sub-wavelength
Terahertz radiation
THz radiation
Ultra-broadband
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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