Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots
We have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon absorption cross-sections as high as 6.2 x10^3 GM are observed at 800 nm (non-resonant regime) in InP/ZnS QDs...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/96530 http://hdl.handle.net/10220/9874 |
| _version_ | 1826122129676959744 |
|---|---|
| author | Wang, Y. Yang, X. He, T. C. Gao, Yuan Demir, Hilmi Volkan Sun, Xiaowei Sun, Handong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Wang, Y. Yang, X. He, T. C. Gao, Yuan Demir, Hilmi Volkan Sun, Xiaowei Sun, Handong |
| author_sort | Wang, Y. |
| collection | NTU |
| description | We have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS
core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon
absorption cross-sections as high as 6.2 x10^3 GM are observed at 800 nm (non-resonant regime) in
InP/ZnS QDs with diameter of 2.8 nm, which is even larger than those of CdSe, CdS, and CdTe
QDs at similar sizes. Furthermore, both of the 2.2 nm and 2.8 nm-sized InP/ZnS QDs exhibit strong
saturable absorption in near resonant regime, which is attributed to large exciton Bohr radius in this
material. These results strongly suggest the promising potential of InP/ZnS QDs for widespread
applications, especially in two-photon excited bio-imaging and saturable absorbing. |
| first_indexed | 2024-10-01T05:43:27Z |
| format | Journal Article |
| id | ntu-10356/96530 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:43:27Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/965302020-03-07T14:02:47Z Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots Wang, Y. Yang, X. He, T. C. Gao, Yuan Demir, Hilmi Volkan Sun, Xiaowei Sun, Handong School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering We have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon absorption cross-sections as high as 6.2 x10^3 GM are observed at 800 nm (non-resonant regime) in InP/ZnS QDs with diameter of 2.8 nm, which is even larger than those of CdSe, CdS, and CdTe QDs at similar sizes. Furthermore, both of the 2.2 nm and 2.8 nm-sized InP/ZnS QDs exhibit strong saturable absorption in near resonant regime, which is attributed to large exciton Bohr radius in this material. These results strongly suggest the promising potential of InP/ZnS QDs for widespread applications, especially in two-photon excited bio-imaging and saturable absorbing. Published version 2013-05-03T06:05:53Z 2019-12-06T19:31:55Z 2013-05-03T06:05:53Z 2019-12-06T19:31:55Z 2013 2013 Journal Article Wang, Y., Yang, X., He, T. C., Gao, Y., Demir, H. V., Sun, X., & Sun, H. D. (2013). Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots. Applied Physics Letters, 102(2). 00036951 https://hdl.handle.net/10356/96530 http://hdl.handle.net/10220/9874 10.1063/1.4776702 en Applied physics letters © 2013 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: http://dx.doi.org/10.1063/1.4776702. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Wang, Y. Yang, X. He, T. C. Gao, Yuan Demir, Hilmi Volkan Sun, Xiaowei Sun, Handong Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title | Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title_full | Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title_fullStr | Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title_full_unstemmed | Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title_short | Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots |
| title_sort | near resonant and nonresonant third order optical nonlinearities of colloidal inp zns quantum dots |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/96530 http://hdl.handle.net/10220/9874 |
| work_keys_str_mv | AT wangy nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT yangx nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT hetc nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT gaoyuan nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT demirhilmivolkan nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT sunxiaowei nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots AT sunhandong nearresonantandnonresonantthirdorderopticalnonlinearitiesofcolloidalinpznsquantumdots |