On-off resonance femtosecond non-linear absorption of chalcogenide glassy films
E. FazioDipartimento di Energetica, Università ‘La Sapienza’, Rome, ItalyD. HulínLaboratoire d'Optique Apliquée, ENSTA-Ecole Polytechnique, Palaiseau cédex, FranceV. ChumashCenter of Optoelectronics, IAP, Academy of Sciences of Moldova, Chisinau, MoldovaFrancesco MichelottiDipartimento di Energetica, Università ‘La Sapienza’, Rome, ItalyA. M. AndrieshCenter of Optoelectronics, IAP, Academy of Sciences of Moldova, Chisinau, MoldovaM. BertolottiDipartimento di Energetica, Università ‘La Sapienza’, Rome, Italy
1994en
ABI
Аннотация
Non-linear absorption of chalcogenide thin films has been investigated with femtosecond pump-probe experiments. Different peculiarities of femtosecond pulse absorption have been found in the case of on- and off-resonance pumping and probing, due to either intraband or interband transitions. The physical mechanisms which can explain such different behaviours are discussed.
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