Phys. Rev. B 76, 115110 (2007) [4 pages]Tunable optical delay using photonic crystal heterostructure nanocavitiesReceived 16 May 2007; published 12 September 2007 We demonstrate tunable optical delay in a coupled resonator structure consisting of a chain of three heterostructure nanocavities. The group index of the device is measured using an interferometric technique, and the tuning is accomplished by the use of an optical pump that selectively heats one of the cavities in the array, altering the coupling and so changing the delay of the system. The speed of light in the device is varied over a range from c∕75 to c∕120 using effective pump powers below 100 μW. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.115110
DOI:
10.1103/PhysRevB.76.115110
PACS:
78.67.−n, 42.70.Qs, 42.82.Bq, 42.82.Et
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