Two photons pumped up conversion lasing.
Low threshold 2ASE and 2PALasing in CdSe/CdS core/shell heterostrucures have been demonstrated for the first time. With the 2PA cross-section σ2 can be controlled by the CdS shell and the PL spectrum controlled by the CdSe core, we demonstrated a 2ASE with a ultralow threshold fluence of ~1.5µJ/cm2....
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2012
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| Online Access: | http://hdl.handle.net/10356/49470 |
| _version_ | 1811692520185266176 |
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| author | Chou, Kok Loong. |
| author2 | Sum Tze Chien |
| author_facet | Sum Tze Chien Chou, Kok Loong. |
| author_sort | Chou, Kok Loong. |
| collection | NTU |
| description | Low threshold 2ASE and 2PALasing in CdSe/CdS core/shell heterostrucures have been demonstrated for the first time. With the 2PA cross-section σ2 can be controlled by the CdS shell and the PL spectrum controlled by the CdSe core, we demonstrated a 2ASE with a ultralow threshold fluence of ~1.5µJ/cm2. Similarly the relation of the quantum yield η with the threshold fluence has been introduced via the 2PA action cross-section σ2η. With TRPL and pump probe experiment had concluded that the 2ASE process can effectively with non-radiative Auger recombination process.
Many different Micro-cavity had been used to realised 2PALasing. Within this project 2PA random lasing with photo-stability had been obtained. Finally plasmonic structures have been investigated and were proven with the present of nano-conductor to generate the surface plasmon, ASE threshold can be significantly reduced. |
| first_indexed | 2024-10-01T06:37:05Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/49470 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:37:05Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/494702023-02-28T23:16:33Z Two photons pumped up conversion lasing. Chou, Kok Loong. Sum Tze Chien School of Physical and Mathematical Sciences National Univeristy of Singapore DRNTU::Science Low threshold 2ASE and 2PALasing in CdSe/CdS core/shell heterostrucures have been demonstrated for the first time. With the 2PA cross-section σ2 can be controlled by the CdS shell and the PL spectrum controlled by the CdSe core, we demonstrated a 2ASE with a ultralow threshold fluence of ~1.5µJ/cm2. Similarly the relation of the quantum yield η with the threshold fluence has been introduced via the 2PA action cross-section σ2η. With TRPL and pump probe experiment had concluded that the 2ASE process can effectively with non-radiative Auger recombination process. Many different Micro-cavity had been used to realised 2PALasing. Within this project 2PA random lasing with photo-stability had been obtained. Finally plasmonic structures have been investigated and were proven with the present of nano-conductor to generate the surface plasmon, ASE threshold can be significantly reduced. Bachelor of Science in Physics 2012-05-21T01:24:37Z 2012-05-21T01:24:37Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/49470 en 94 p. application/pdf |
| spellingShingle | DRNTU::Science Chou, Kok Loong. Two photons pumped up conversion lasing. |
| title | Two photons pumped up conversion lasing. |
| title_full | Two photons pumped up conversion lasing. |
| title_fullStr | Two photons pumped up conversion lasing. |
| title_full_unstemmed | Two photons pumped up conversion lasing. |
| title_short | Two photons pumped up conversion lasing. |
| title_sort | two photons pumped up conversion lasing |
| topic | DRNTU::Science |
| url | http://hdl.handle.net/10356/49470 |
| work_keys_str_mv | AT choukokloong twophotonspumpedupconversionlasing |