Combined local and carrier transport optical nonlinearities in a hetero n-i-p-i structure

Alan Kost, Michael Jupina, Elsa Garmire, T. C. Hasenberg

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Nonlinear optical effects have been measured in a novel hetero n-i-p-i structure with strained InAs/GaAs superlattices as the quantum wells. For intensities below 6 W/cm2, changes in transmission are observed due to the screening of built-in fields in conjunction with the quantum-confined Stark effect. For intensities greater than 30 W/cm2, a further increase in transmission is observed due to state filling and exciton screening in the wells. It is demonstrated that a n-i-p-i structure, because of its lengthened carrier lifetime, can be used to reduce the intensity necessary for exciton saturation and state filling in quantum wells when the wells are placed in the i regions. Total changes in transmission greater than 25% have been seen, with no sign that the nonlinearity is saturating at 1 kW/cm2 (the highest excitation used here).

Original languageEnglish (US)
Pages (from-to)1018-1020
Number of pages3
JournalApplied Physics Letters
Issue number10
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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