Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
80 (1996), S. 2533-2535
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We show that quantum confinement can dramatically alter the density-dependence of the third-order susceptibility, χ(3)NP, that arises from band nonparabolicity. Our results predict an oscillatory dependence of the efficiencies for third-harmonic generation and four-wave mixing on the subband occupation of quantum wells, and for narrow wells with high charge densities predict an enhancement over the bulk susceptibility. We also make a simple estimate of the fields required to saturate this nonparabolicity contribution to χ(3). We discuss these results in light of recent experiments on third-harmonic generation from narrow-gap quantum wells at frequencies of ∼1 THz, and show that nonparabolicity may not be the only nonlinearity contributing to the large χ(3) observed. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.363040
| Library |
Location |
Call Number |
Volume/Issue/Year |
Availability |
