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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 24, Iss. 15 — Aug. 1, 1999
  • pp: 1068–1070

Dynamic Franz-Keldysh effect: excitonic versus free-carrier excitation schemes

S. Hughes and D. S. Citrin  »View Author Affiliations


Optics Letters, Vol. 24, Issue 15, pp. 1068-1070 (1999)
http://dx.doi.org/10.1364/OL.24.001068


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Abstract

We theoretically investigate the dynamic Franz–Keldysh effect for subpicosecond optical pulses on quantum wells as a function of detuning from the bandgap. For specific spectral excitation regimes we find dramatic nonlinear enhancement effects that are due to the preferential creation of terahertz- (THz-) field-driven propagating excitons and free electron–hole pairs in the THz and the optical domains, respectively. Our results explain why previous measurements of THz sidebands in the optical domain were so weak; we suggest and demonstrate a remarkably better experiment.

© 1999 Optical Society of America

OCIS Codes
(130.5990) Integrated optics : Semiconductors
(190.0190) Nonlinear optics : Nonlinear optics
(320.7120) Ultrafast optics : Ultrafast phenomena

Citation
S. Hughes and D. S. Citrin, "Dynamic Franz-Keldysh effect: excitonic versus free-carrier excitation schemes," Opt. Lett. 24, 1068-1070 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-15-1068

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