We have investigated the effect of non-equilibrium phonons on carrier relaxation dynamics in a quantum wire following ultrafast photoexcitation. We show that phonon build-up produces a considerable reduction of the cooling rate of photoexcited carriers for densities of the order of 10(6) cm(-1). In this respect, the results for quantum wires are found to be similar to the bulk case. An important consequence of the reduced dimensionality of wires is found in the non-equilibrium phonon distribution, which is populated even at very small wave vectors.
Hot Phonons in Quantum Wires: A Monte Carlo Investigation / Rota, L.; Ryan, J. F.; Rossi, Fausto; Lugli, P.; Molinari, E.. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 28:4(1994), pp. 277-282. [10.1209/0295-5075/28/4/010]
Hot Phonons in Quantum Wires: A Monte Carlo Investigation
ROSSI, FAUSTO;
1994
Abstract
We have investigated the effect of non-equilibrium phonons on carrier relaxation dynamics in a quantum wire following ultrafast photoexcitation. We show that phonon build-up produces a considerable reduction of the cooling rate of photoexcited carriers for densities of the order of 10(6) cm(-1). In this respect, the results for quantum wires are found to be similar to the bulk case. An important consequence of the reduced dimensionality of wires is found in the non-equilibrium phonon distribution, which is populated even at very small wave vectors.Pubblicazioni consigliate
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https://hdl.handle.net/11583/1405273
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