Two-photon transitions between bound-to-continuum states in AIGaAs/GaAs multiple quantum well

Jin U. Kang; Jacob Khurgin; Jacob Khurgin; C.C. Yang; C.C. Yang; H.H. Lin; H.H. Lin; George I. Stegeman; George I. Stegeman

International Quantum Electronics Conference
OSA Technical Digest (Optica Publishing Group, 1998),
paper QFH5

Two-photon transitions between bound-to-continuum states in AIGaAs/GaAs multiple quantum well

Jin U. Kang, Jacob Khurgin, C.C. Yang, H.H. Lin, and George I. Stegeman

International Quantum Electronics Conference 1998

San Francisco, California United States
3–8 May 1998
ISBN: 1-55752-542-0

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NLO in Solids (QFH)

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J. U. Kang, J. Khurgin, C. C. Yang, H. H. Lin, and G. I. Stegeman, "Two-photon transitions between bound-to-continuum states in AIGaAs/GaAs multiple quantum well," in International Quantum Electronics Conference, P. Corkum and N. Peyghambarian, eds., Vol. 7 of OSA Technical Digest (Optica Publishing Group, 1998), paper QFH5.

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Abstract

Quantum-confined structures such as multiple quantum wells (MQWs) exhibit room-temperature exciton resonances, and it is well known that these resonances may enhance the nonlinear optical properties of an MQW compared with that of a bulk material. Although there have been some studies on the nonlinear optical properties of MQWs near half the bandgap, they all failed to show clearly both the magnitude and the position of the two-photon excitonic resonance.^1,2 In this work, we show detailed two-photon absorption (TPA) studies of an MQW near half the bandgap where we have observed the excitons with reduced binding energy due to the two-photon transitions between the bound and continuum states.

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