Room Temperature Exciton Absorption, Excitonic Nonlinearities, and Exciton-Phonon Interaction in (Zn,Cd)Se/ZnSe Quantum Wells,
BROWN UNIV PROVIDENCE RI
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Wide-bandgap II-VI compound semiconductor heterostructures are presently being researched for their potential optoelectronic applications at short visible wavelengths, especially in the blue region of the spectrum. In terms of prospective modulator use, a particular difficulty has been the absence so far of the distinct exciton resonances which have been widely exploited e.g. for electro-absorptive purposes in III-V semiconductor quantum wells. In case of ZnSe and related alloys, the problem is fundamental due to the very large exciton-LO phonon coupling the Frohlich interaction strength for bulk ZnSe is six to eight times larger than that for GaAs.
- Electrooptical and Optoelectronic Devices