Ultrafast optical response of a high-reflectivity GaAsAlAs Bragg mirror

Sara R. Hastings, Michiel J.A. De Dood, Hyochul Kim, William Marshall, Hagai S. Eisenberg, Dirk Bouwmeester*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The ultrafast response of a high-reflectivity GaAsAlAs Bragg mirror to optical pumping is investigated for all-optical switching applications. Both Kerr and free carrier nonlinearities are induced with 100 fs, 780 nm pulses with a fluence of 0.64 and 0.8 kJm2. The absolute transmission of the mirror at 931 nm increases by a factor of 27 from 0.0024% to 0.065% on a picosecond time scale. These results demonstrate the potential for a high-reflectivity ultrafast switchable mirror for quantum optics and optical communication applications. A design is proposed for a structure to be pumped below the band gaps of the semiconductor mirror materials. Theoretical calculations on this structure show switching ratios up to 2200 corresponding to switching from 0.017% to 37.4% transmission.

Original languageAmerican English
Article number031109
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number3
StatePublished - 17 Jan 2005
Externally publishedYes

Bibliographical note

Funding Information:
The authors thank W. Irvine and C. Simon for useful discussions. This work was supported by NSF Grant No. PHY-0334970 and DARPA Grant No. MDA972-01-1-0027. S.H. is supported by a NSF Graduate Fellowship.


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