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dc.contributor.advisorKarunasiri, Gamani
dc.contributor.authorYeo, Hwee Tiong
dc.dateDecember 2004
dc.date.accessioned2012-03-14T17:31:12Z
dc.date.available2012-03-14T17:31:12Z
dc.date.issued2004-12
dc.identifier.urihttp://hdl.handle.net/10945/1294
dc.description.abstractIn this thesis, the performance of a step quantum well infrared photodetector (QWIP), which was designed to detect a laser spot at 1.05 m æ and IR radiation between 9.5 m æ to 10.5 m æ, was evaluated. In the far infrared (FIR), the maximum responsivity of the test detector at 10 K was measured at 1.02 A/W with a peak wavelength of 10.3 æm under a negative bias of 0.83 V. The D* at background limited infrared performance (BLIP) was measured at 9 8.0 10 cm Hz /W with 180o field of view. The BLIP temperature was found to be about 55 K. In addition, the FIR detection wavelength found shift with the amount of bias across the device. The amount of shift observed was 0.21 meV/KVcm-1 which is due to linear Stark effect associated with the step quantum well. The quantum well infrared detectors made of square quantum wells found to have an order of magnitude lower Stark shift originated from second order effects. This suggests that the step well infrared detector can have applications in tunable wavelength infrared detectors.en_US
dc.description.urihttp://archive.org/details/highresponsivity109451294
dc.format.extentxiv, 65 p. : ill. (some col.)en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsCopyright is reserved by the copyright owneren_US
dc.subject.lcshInfrared detectorsen_US
dc.subject.lcshPhysicsen_US
dc.titleHigh responsivity tunable step quantum well infrared photodetectoren_US
dc.typeThesisen_US
dc.contributor.secondreaderLuscombe, James
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Physics
dc.subject.authorAsymmetric quantum wellen_US
dc.subject.authorStep Quantum Well Infrared Photodetectoren_US
dc.subject.authorStark effecten_US
dc.description.serviceMajor, Republic of Singapore Navyen_US
etd.thesisdegree.nameM.S. in Applied Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineApplied Physicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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