Abstract
We report all-optical switching due to state-filling in quantum dots (QDs). The switching energy is as low as 6 fJ since state-filling requires only 2 electron-hole pairs per QD. The single layer of InAs/InP QDs is inserted within a InGaAsP/InP waveguide, which is processed into a Mach-Zehnder Interferometric space switch (MZI). A 1530-1570 nm probe beam is switched by optical excitation of one MZI-arm from above. By exciting below the InGaAsP bandgap, we prove that the refractive index nonlinearity is entirely due to state-filling in the QDs.
Original language | English |
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Title of host publication | Proc. [CD-ROM] Photonics 2004 Cochin, India (2004) (invited presentation) |
Place of Publication | Cochin, India |
Pages | 1-6 |
Publication status | Published - 2004 |
Event | Photonics 2004, Cochin, India - Cochin, India Duration: 1 Jan 2004 → … |
Conference
Conference | Photonics 2004, Cochin, India |
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Country/Territory | India |
City | Cochin |
Period | 1/01/04 → … |
Other | Photonics 2004 |