Effects of post-growth annealing on the structure and electro-optical properties of low-temperature grown GaAs

被引：15

作者：

Youn, Doo-Hyeb ^{[1
]}

Lee, Seung-Hwan ^{[1
]}

Ryu, Han-Cheol ^{[1
]}

Jung, Se-Young ^{[1
]}

Kang, Seung-Bum ^{[1
]}

Kwack, Min-Hwan ^{[1
]}

Kim, Sungil ^{[1
]}

Choi, Sang-Kuk ^{[1
]}

Baek, Mun-Cheol ^{[1
]}

Kang, Kwang-Yong ^{[1
]}

Kim, Chang-Seop ^{[2
]}

Yee, Ki-Ju ^{[2
]}

Ji, Young-Bin ^{[3
]}

Lee, Eui-Su ^{[3
]}

Jeon, Tae-In ^{[3
]}

Kim, Seong-Jin ^{[4
]}

Kumar, Sanjeev ^{[5
,6
]}

Kim, Gil-Ho ^{[5
,6
]}

机构：

[1] Elect & Telecommun Res Inst, IT Components & Mat Technol Res Div, Taejon 305350, South Korea

[2] Chungnam Natl Univ, Dept Phys, Taejon 305764, South Korea

[3] Korea Marine Univ, Dept Elect & Elect Engn, Pusan 606791, South Korea

[4] Mitsubishi Cable Ind Ltd, Amagasaki, Hyogo 6600856, Japan

[5] Sungkyunkwan Univ, Sch Informat & Commun Engn, Suwon 440746, South Korea

[6] Sungkyunkwan Univ, Adv Inst Nanotechnol, Suwon 440746, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 12期

关键词：

D O I：

10.1063/1.2946452

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper investigates how postgrowth annealing affects the structure and the electro-optical properties of low-temperature grown GaAs (LT-GaAs). A systematic study of as-grown and annealed LT-GaAs revealed that the carrier lifetime is directly related to the density of the An duster and distance between As clusters. The Ga/As compositional ratio and the crystal structure of As clusters were observed for the first time. The As/Ga ratio of the As clusters is higher than that obtained from the LT-GaAs. The carrier lifetime of the annealed LT-GaAs increases as the annealing temperature increases from 400 (less than 30 fs) to 800 degrees C (824 fs). Under the annealing temperatures ranging from 600 to 700 degrees C for 90 s, we observed the emission of terahertz radiation using the annealed LT-GaAs grown at temperatures ranging from 260 to 320 degrees C. (c) 2008 American Institute of Physics.

引用

页数：5

共 17 条

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