教師資料查詢 | 類別: 期刊論文 | 教師: 林大欽 LING, DAH-CHIN (瀏覽個人網頁)

標題:Quantum Hall Dual-Band Infrared Photodetector
學年106
學期1
出版(發表)日期2017/12/01
作品名稱Quantum Hall Dual-Band Infrared Photodetector
作品名稱(其他語言)
著者Chiu-Chun Tang, K. Ikushima, D. C. Ling, C. C. Chi, and Jeng-Chung Chen
單位
出版者
著錄名稱、卷期、頁數PHYSICAL REVIEW APPLIED 8, 064001 (2017)
摘要We have developed a hybrid quantum Hall midinfrared (QHMIR)–quantum Hall far-infrared (QHFIR)
photodetector by the use of graphene-GaAs=ðAl; GaÞAs–layered composite material. Both MIR and FIR
photoresistance are observed in a single chip by utilizing cyclotron resonance in the quantum Hall regimes
of graphene and two-dimensional electron gas (2DEG) in GaAs=ðAl; GaÞAs heterostructure, respectively.
By cooperatively operating 2DEG as a back-gate electrode to change the carrier density of graphene or
graphene as a top-gate electrode to modulate the carrier density of 2DEG with an applied gate voltage less
than 1 V and applying the magnetic field to tune cyclotron resonance, we achieve a wide frequency
selectivity, covering 640–790 cm−1 for the graphene-QHMIR detector and 24–89 cm−1 for the 2DEGQHFIR
detector. Moreover, our design integrates a log-periodic antenna with the detector to minimize the
device size, while preserving high sensitivity. Our results pave the way for implementing a highly tunable
MIR-to-FIR photodetector and a dual-band (MIR-FIR) imaging array.
關鍵字Quantum Physics, Semiconductor Physics, optoelectronics
語言英文(美國)
ISSN2331-7019 (Online)
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度1
國別美國
公開徵稿
出版型式,電子版,紙本
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