Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2011
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| Online Access: | http://hdl.handle.net/1721.1/62456 |
| _version_ | 1826193741244792832 |
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| author | Chan, Chun Wang Ivan |
| author2 | Qing Hu. |
| author_facet | Qing Hu. Chan, Chun Wang Ivan |
| author_sort | Chan, Chun Wang Ivan |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010. |
| first_indexed | 2024-09-23T09:44:11Z |
| format | Thesis |
| id | mit-1721.1/62456 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T09:44:11Z |
| publishDate | 2011 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/624562019-04-10T18:00:27Z Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers Chan, Chun Wang Ivan Qing Hu. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 153-157). The as yet unattained milestone of room-temperature operation is essential for establishing Terahertz Quantum Cascade Lasers (THz QCLs) as practical sources of THz radiation. Temperature performance is hypothesized to be limited by upper laser level lifetime reduction due to non-radiative scattering, particularly by longitudinal optical phonons. To address this issue, this work studies highly "diagonal" QCLs, where the upper and lower laser level wave functions are spatially separated to preserve upper laser level lifetime, as well as several other issues relevant to high temperature performance. The highly diagonal devices of this work performed poorly, but the analysis herein nevertheless suggest that diagonality as a design strategy cannot yet be ruled out. Other causes of poor performance in the lasers are identified, and suggestions for future designs are made. by Chun Wang Ivan Chan. S.M. 2011-04-25T16:01:50Z 2011-04-25T16:01:50Z 2010 2010 Thesis http://hdl.handle.net/1721.1/62456 711180404 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 157 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Chan, Chun Wang Ivan Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title | Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title_full | Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title_fullStr | Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title_full_unstemmed | Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title_short | Characterization and analysis of highly diagonal Terahertz Quantum Cascade Lasers |
| title_sort | characterization and analysis of highly diagonal terahertz quantum cascade lasers |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/62456 |
| work_keys_str_mv | AT chanchunwangivan characterizationandanalysisofhighlydiagonalterahertzquantumcascadelasers |