2004 Fiscal Year Final Research Report Summary
Dynamics of carrier transport through the higher energy subbands in semiconductor superlattices
| Project/Area Number |
14350013
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Osaka City University |
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Principal Investigator |
HOSODA Makoto Osaka City University, Faculty of engineering, Professor, 大学院・工学研究科, 教授 (80326248)
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| Project Period (FY) |
2002 – 2004
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| Keywords | semiconductor superlattice / quantum well / higher subband / carrier transport / S-L electron scattering / photocurrent impulse response / electric field domain / quantum-well microtube |
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| Research Abstract |
1. Carrier transport through higher energy subbands in asymmetric-double-quantum-well superlattices was investigated. Various carrier transport behaviors affected by state resonances related to higher subbands were observed. In addition, we proposed novel optical devices based on carrier transport through the higher subbands.
2. Type-II to type-I transition was observed in quantum-well microtubes, which was caused by uniaxial strain.
3. X-Lelectron transport between the indirect subband states was observed for the first time in semiconductor superlattices.
4. Electric field domain formation affected by higher subbands was investigated in asymmetric-double-quantum-well superlattices. Period by period movement of the domain boundary was clearly observed through photoluminescence measurement.
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