Nonlinear absorption and refraction of quantum confined InP nanocrystals grown in porous glass
- 13 February 1995
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 66 (7) , 804-806
- https://doi.org/10.1063/1.113426
Abstract
Single‐beam Z‐scan experiments have been used to measure the two‐photon absorption coefficient β and bound electronic nonlinear refractive index γ of composites of InP nanocrystals grown in 40 and 150 Å Vycor porous glass. These materials were also studied with two‐beam time‐resolved Z scans to confirm that the nonlinearities are instantaneous with respect to the ∼100 ps pulses used. The magnitudes of the nonlinearities in the 150 Å sample are found to be similar to those of bulk InP when scaled by the volume fraction of deposited material. For the 40 Å sample the ratio γ/β is enhanced by a factor of fourteen compared to bulk InP.Keywords
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