Local ultrafast optical excitation of electron-hole pairs in disordered semiconductors provides t... more Local ultrafast optical excitation of electron-hole pairs in disordered semiconductors provides the possibility to observe experimentally interaction-assisted propagation of correlated quantum particles in a disordered environment. In addition to the interaction driven delocalization known for the conventional single-band TIP-(two-interacting-particles)-problem the semiconductor model has a richer variety of physical parameters that give rise to new features in the temporal dynamics. These include different masses, correlated vs. anticorrelated disorder for the two particles, and dependence on spectral position of excitation pulse.
4\ eE, FIG. 2. Electron beammagnetic fielddielectric system. We begin by calculating the force ... more 4\ eE, FIG. 2. Electron beammagnetic fielddielectric system. We begin by calculating the force on an element of the electron fluid due to the perturbation. The resulting equa-tions of motion are solved to give the perturbed beam veloc-ity. Specifically, d (ymyT F = dt -е(Е + т,.ХВ.,./ ...
A two-band model of a disordered semiconductor is used to analyze dynamical interaction induced w... more A two-band model of a disordered semiconductor is used to analyze dynamical interaction induced weakening of localization in a system that is accessible to experimental verification. The results show a dependence on the sign of the two-particle interaction and on the optical excitation energy of the Coulomb-correlated electron-hole pair.
... 2585 Appi. Phys. Lett., Vol. 53, No. 26,28 December 1988 Golub era/. 2585 Page 3. e es e о m ... more ... 2585 Appi. Phys. Lett., Vol. 53, No. 26,28 December 1988 Golub era/. 2585 Page 3. e es e о m M и Etecíric electric field. ... This contrasts with SQWs where large Stark shifts are only achieved with wide wells where the fundamental optical transition is near the GaAs band gap. ...
... P. England, JE Golub,a) LT Florez, and JP Harbison Bellcore, Red Bank, New Jersey 07701-7040 ... more ... P. England, JE Golub,a) LT Florez, and JP Harbison Bellcore, Red Bank, New Jersey 07701-7040 (Received 10 September 1990; accepted for ... we show that (1) a resonant tunneling structure can be switched from one stable state to another with a band-gap light pulse, and that ...
If authors will state in their covering communications whether they expect their institutions to ... more If authors will state in their covering communications whether they expect their institutions to pay the publication charge, publication time should be shortened {for those who do).
We have performed a photon-echo experiment on the 555.6-nm intercombination line of atomic Yb vap... more We have performed a photon-echo experiment on the 555.6-nm intercombination line of atomic Yb vapor which demonstrates that an intense laser field acts to inhibit the dephasing resulting from velocity-changing collisions. This finding implies that the optical Bloch equations, which assume that relaxation is independent of the strength of the driving field, cannot correctly describe the behavior of gas-phase samples in all regimes.
We study experimentally the slow relaxation of the mean energy and radiative rate of a system of ... more We study experimentally the slow relaxation of the mean energy and radiative rate of a system of interacting, two-dimensional electrons and holes in the presence of static disorder. The system evolves through two phases: an early, excitonic phase and a long-time, distant-pair phase. The results differ from the usual energyloss hopping because of the dominant role of interactions in the present system. ͓S0163-1829͑97͒00407-4͔
Local ultrafast optical excitation of electron-hole pairs in disordered semiconductors provides t... more Local ultrafast optical excitation of electron-hole pairs in disordered semiconductors provides the possibility to observe experimentally interaction-assisted propagation of correlated quantum particles in a disordered environment. In addition to the interaction driven delocalization known for the conventional single-band TIP-(two-interacting-particles)-problem the semiconductor model has a richer variety of physical parameters that give rise to new features in the temporal dynamics. These include different masses, correlated vs. anticorrelated disorder for the two particles, and dependence on spectral position of excitation pulse.
4\ eE, FIG. 2. Electron beammagnetic fielddielectric system. We begin by calculating the force ... more 4\ eE, FIG. 2. Electron beammagnetic fielddielectric system. We begin by calculating the force on an element of the electron fluid due to the perturbation. The resulting equa-tions of motion are solved to give the perturbed beam veloc-ity. Specifically, d (ymyT F = dt -е(Е + т,.ХВ.,./ ...
A two-band model of a disordered semiconductor is used to analyze dynamical interaction induced w... more A two-band model of a disordered semiconductor is used to analyze dynamical interaction induced weakening of localization in a system that is accessible to experimental verification. The results show a dependence on the sign of the two-particle interaction and on the optical excitation energy of the Coulomb-correlated electron-hole pair.
... 2585 Appi. Phys. Lett., Vol. 53, No. 26,28 December 1988 Golub era/. 2585 Page 3. e es e о m ... more ... 2585 Appi. Phys. Lett., Vol. 53, No. 26,28 December 1988 Golub era/. 2585 Page 3. e es e о m M и Etecíric electric field. ... This contrasts with SQWs where large Stark shifts are only achieved with wide wells where the fundamental optical transition is near the GaAs band gap. ...
... P. England, JE Golub,a) LT Florez, and JP Harbison Bellcore, Red Bank, New Jersey 07701-7040 ... more ... P. England, JE Golub,a) LT Florez, and JP Harbison Bellcore, Red Bank, New Jersey 07701-7040 (Received 10 September 1990; accepted for ... we show that (1) a resonant tunneling structure can be switched from one stable state to another with a band-gap light pulse, and that ...
If authors will state in their covering communications whether they expect their institutions to ... more If authors will state in their covering communications whether they expect their institutions to pay the publication charge, publication time should be shortened {for those who do).
We have performed a photon-echo experiment on the 555.6-nm intercombination line of atomic Yb vap... more We have performed a photon-echo experiment on the 555.6-nm intercombination line of atomic Yb vapor which demonstrates that an intense laser field acts to inhibit the dephasing resulting from velocity-changing collisions. This finding implies that the optical Bloch equations, which assume that relaxation is independent of the strength of the driving field, cannot correctly describe the behavior of gas-phase samples in all regimes.
We study experimentally the slow relaxation of the mean energy and radiative rate of a system of ... more We study experimentally the slow relaxation of the mean energy and radiative rate of a system of interacting, two-dimensional electrons and holes in the presence of static disorder. The system evolves through two phases: an early, excitonic phase and a long-time, distant-pair phase. The results differ from the usual energyloss hopping because of the dominant role of interactions in the present system. ͓S0163-1829͑97͒00407-4͔
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