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Quantum-confined Stark effect of GaInNAs(Sb) quantum wells at 1300–1600 nm

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4 Author(s)
Lordi, Vincenzo ; Solid State and Photonics Laboratory, Stanford University, Stanford, California 94305 ; Yuen, Homan B. ; Bank, S.R. ; Harris, James S.

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We report the measurement of electroabsorption spectra from GaInNAs and GaInNAsSb quantum wells grown on GaAs showing quantum-confined Stark effect behavior suitable for optical modulation at 1300 and 1550 nm wavelength, respectively. The high quality of our material is evidenced by sharp exciton resonances with a full width at half maximum ≪25 meV at 295 K, and peak absorption coefficient of 18 000 cm-1 for GaInNAs and 34 800 cm-1 for GaInNAsSb. Changes in absorption coefficient 10 000 cm-1 with an applied electric field were measured. Device performance from these materials is expected to be comparable to or better than the competing material grown on InP.

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Applied Physics Letters  (Volume:85 ,  Issue: 6 )