標題: ENHANCEMENT OF THE STARK-EFFECT IN ALINAS/GAINAS COUPLED QUANTUM-WELLS AND THEIR APPLICATIONS TO TUNABLE MIDINFRARED PHOTODETECTORS
作者: HUANG, YM
LIEN, CH
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-Sep-1994
摘要: A tunable midinfrared photodetector using 1 --> 4 intersubband Stark shift in the four-level AlInAs/GaInAs coupled quantum wells (CQWs) is proposed. The operation of this device is based on the infrared absorption by the electrons in the ground state transited from the ground-state subband E1 of the CQWs to the third-excited-state subband E4. A large variation of eigenenergy spacing DELTAE41 between E1 and E4 under an applied electric field can be achieved for the proposed AlInAs/GaInAs CQW system. Since the infrared radiation is absorbed via the intersubband resonance absorption (homegaBAR = E4-E1), the detected infrared wavelength can be tuned by the spacing DELTAE41 which can be adjusted by an applied electric field. The tunability of these AlInAs/GaInAs CQWs have been studied theoretically. Based on theoretical calculations, tuning ranges from 3 to 3.9 and 2.9 to 4.2 mum are predicted for the proposed asymmetric CQW structure and compositionally asymmetric COW structure, respectively. This tuning capability is achieved by varying the applied electric field in the 90 to -90 kV/cm range.
URI: http://dx.doi.org/10.1063/1.358503
http://hdl.handle.net/11536/149117
ISSN: 0021-8979
DOI: 10.1063/1.358503
期刊: JOURNAL OF APPLIED PHYSICS
Volume: 76
起始頁: 3181
結束頁: 3186
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