期刊論文

學年 103
學期 1
出版(發表)日期 2014-11-03
作品名稱 Highly tunable quantum Hall far-infrared photodetector by use of GaAs/Al x Ga1 − x As-graphene composite material
作品名稱(其他語言)
著者 Tang, Chiu-Chun; Ling, D. C.; Chi, C. C.; Chen, Jeng-Chung
單位 淡江大學物理學系
出版者 Melville: A I P Publishing LLC
著錄名稱、卷期、頁數 Applied Physics Letters 105, 181103
摘要 We have developed a highly tunable, narrow band far-infrared (FIR) photodetector which utilizes the characteristic merits of graphene and two-dimensional electron gas (2DEG) in GaAs/Al x Ga1 − xAs heterostructure in the Quantum Hall states (QHS). The heterostructure surface is covered with chemical vapor-deposited graphene, which functions as a transparent top-gate to vary the electron density of the 2DEG. FIR response observed in the vicinity of integer QH regime can be effectively tuned in a wide range of 27–102 cm−1 with a bias voltage less than −1 V. In addition, we have found that the presence of graphene can genuinely modulate the photoresponse. Our results demonstrate a promising direction for realizing a tunable long-wavelength FIR detector using QHS in GaAs 2DEG/ graphene composite material.
關鍵字
語言 en_US
ISSN 1077-3118
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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