科研之友
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摘要
Accurate nonperturbative Floquet theory is used to study nonlinear multiphoton transitions in quantum dot involving interband and intersubband states. The interband transitions generate electron-hole pairs, which in turn give rise to photocurrent useful for making multiphoton photodetector. We find the direct role of multiphoton absorption processes over the single photon absorption in enhancing the sensitivity of the photodetector for photon energy equal to or less than the half of the bandgap energy.
- 出版日期2011-3-1
