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Stimulated Rayleigh...
Stimulated Rayleigh-Bragg Scattering From a Two-Photon Absorbing CdSe-CdS-ZnS Quantum-Rods System : Optical Power Limiting and Phase-Conjugation
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He, G. S. (författare)
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Yong, K. T. (författare)
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Qin, H. Y. (författare)
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Zheng, Q. D. (författare)
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Prasad, P. N. (författare)
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- He, Sailing (författare)
- KTH,Elektroteknisk teori och konstruktion
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- Ågren, Hans (författare)
- KTH,Teoretisk kemi
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(creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2008
- 2008
- Engelska.
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Ingår i: IEEE Journal of Quantum Electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9197 .- 1558-1713. ; 44:9-10, s. 894-901
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- This work reports the properties of stimulated Rayleigh-Bragg scattering (SRBS) from a two-photon absorbing CdSe-Cds-ZnS quantum-rods (QRs) solution in chloroform, excited by 1064-nm and similar to 13-ns laser pulses. The two-photon absorbing capability of the scattering medium, as well as the pump threshold, spectral structure, and pulse waveforms of the backward stimulated scattering were measured. Comparing to a pure solvent or an organic dye-solution, the semiconductor QR system has many advantages such as the lower pump threshold, higher energy transfer efficiency, and better photo-physical and photo-chemical stability. The measured output/input characteristic curve shows that the backward SRBS can enhance the optical power limiting performance that is based on two-photon absorption, backward stimulated scattering, and other nonlinear absorption mechanisms. In addition, the backward SRBS beam from our sample medium exhibits a fairly good optical phase-conjugation capability, so that the distortion influence from an inserted aberrator can be automatically removed.
Nyckelord
- Optical phase conjugation
- power limiting
- quantum rods (QRs)
- stimulated Rayleigh-Bragg scattering
- two-photon absorption
- nonlinear absorption
- carrier dynamics
- dots
- excitation
- cdte
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