2026-09-20T23:30:57Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/34583 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Chuang, Shun-Lien Qiao, Pengfei 2012-09-18T21:26:40Z 2012-09-18T21:26:40Z 2014-09-18T10:00:56Z 2012-08 2012-09-18T21:26:40Z 2012-08 The InAs/GaSb type-II superlattices have drawn extensive research interest in the past few decades. The type-II band alignment in this material system provides a long cutoff wavelength and a wide optical tunable range in the mid-infrared regime. Photodetectors based on type-II superlattices are theoretically predicted to surpass the performance of those based on the commercialized HgCdTe II-VI system. An electronic band structure model is formulated based on the 8-band k · p method. The absorption and quantum efficiency spectra are calculated, showing good agreement with experimental data. The interfacial effect in type-II superlattices is investigated. It is shown that the interfacial layers can be employed not only to balance lattice strain and reduce detector dark current, but also to simultaneously increase the cutoff wavelength and quantum efficiency. State-of-art interface controlled samples designed for comparison study are processed into devices. The device performance is characterized electrically by dark current measurements, and optically by Fourier transform infrared spectroscopy. Significant improvement of device performance by interface control is demonstrated, which agrees with the prediction by the theoretical model. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-07-17T17:26:40Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 11 Abs.tex: 1275 bytes, checksum: e4c9298f38bd743867aa480e07e81517 (MD5) ApxB.tex: 8269 bytes, checksum: 31eaaefc090fe0c6445701c24c67974b (MD5) ApxA.tex: 5009 bytes, checksum: 60d638a30bb87e75941c0ff16050444f (MD5) Ch6_Conclusion.tex: 5508 bytes, checksum: ba0c9692a2f905be7efca168d870aafd (MD5) Ch5_IFdetector.tex: 24216 bytes, checksum: 312f977c515816bac0f46395dfb4528c (MD5) Ch4_Device.tex: 24056 bytes, checksum: e516183c15c598f941e55a11a0e7813a (MD5) Ch3_Optical.tex: 27189 bytes, checksum: fefc4b1b89a682a528de8d9ab39ec594 (MD5) Ch2_Eband.tex: 32300 bytes, checksum: 301d5d7b09d5231a8da261fdfb7a4fe8 (MD5) Ch1_Intro.tex: 23450 bytes, checksum: 363efd230a90a559cd7e98da41cfc3c3 (MD5) MS_thesis_Qiao.tex: 4823 bytes, checksum: aae1db7e2316da72b8dc4041603f040b (MD5) Qiao_Pengfei.pdf: 6644183 bytes, checksum: 3924ce8f3d0b05e1daf2b4d5b80d0992 (MD5) Made available in DSpace on 2012-09-18T21:26:40Z (GMT). No. of bitstreams: 12 Qiao_Pengfei.pdf: 6644183 bytes, checksum: 3924ce8f3d0b05e1daf2b4d5b80d0992 (MD5) license.txt: 4059 bytes, checksum: 6a28b949d599156c982fca36837617ba (MD5) MS_thesis_Qiao.tex: 4823 bytes, checksum: aae1db7e2316da72b8dc4041603f040b (MD5) Ch1_Intro.tex: 23450 bytes, checksum: 363efd230a90a559cd7e98da41cfc3c3 (MD5) Ch2_Eband.tex: 32300 bytes, checksum: 301d5d7b09d5231a8da261fdfb7a4fe8 (MD5) Ch3_Optical.tex: 27189 bytes, checksum: fefc4b1b89a682a528de8d9ab39ec594 (MD5) Ch4_Device.tex: 24056 bytes, checksum: e516183c15c598f941e55a11a0e7813a (MD5) Ch5_IFdetector.tex: 24216 bytes, checksum: 312f977c515816bac0f46395dfb4528c (MD5) Ch6_Conclusion.tex: 5508 bytes, checksum: ba0c9692a2f905be7efca168d870aafd (MD5) ApxA.tex: 5009 bytes, checksum: 60d638a30bb87e75941c0ff16050444f (MD5) ApxB.tex: 8269 bytes, checksum: 31eaaefc090fe0c6445701c24c67974b (MD5) Abs.tex: 1275 bytes, checksum: e4c9298f38bd743867aa480e07e81517 (MD5) Restriction data tranferred 2014-07-01T11:35:55-05:00 Original Data Group with Access Administrator Release Date: 2014-09-18 16:27:16 UTC Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Item marked as restricted to the 'Administrator' Group (id=1) by Seth Robbins (srobbins@illinois.edu) on 2012-09-18T21:27:36Z Item is restricted until 2014-09-18T21:27:16Z Limited Restriction Lifted for Item 34857 on 2014-09-18T10:00:56Z. http://hdl.handle.net/2142/34583 en Copyright 2012 Pengfei Qiao Type-II superlattice Infrared Photodetectors Band structures k.p method Infrared spectroscopy Interfacial effect Theory and experiments of type-II superlattice infrared photodetectors Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Thesis M.S. MS:Electr & Computer Eng-UIUC 10KS1200MS