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Organic Vertical Cavity Surface Emitting Lasers (OVCSEL)
- Investigation of microcavities filled with organic semiconductors as active material
- Sample preparation in the IAPP in the OAM group (Organic Anorganic Mixed layers) at our institute
- The speciality at our institute is the in-situ preparation of a monolithic device consisting of two highly reflecting
distributed Bragg reflector (DBR) mirrors and an active organic layer in between
- Currently, only optical pumping with pulsed laser sources yields lasing
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Scheme of microcavity structure with two DBR and an active layer of Alq3:DCM. The blue pump beam causes a cone
of laser emission (orange). From [Koschorreck et al. 2005].
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Emission dynamics of optically pumped OVCSEL
- Investigation of time resolved OVCSEL laser output after pulsed optical pumping
- Time dependence measured by upconversion (optical gating)
- Dynamics can be completely modeled by standard laser rate equations
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Ultrafast transmission dynamics of empty cavities
- Investigation of "empty" microcavities (central layer filled with dielectric)
- Study of temporal behavior of transmitted laser pulse by upconversion (optical gating)
- For cavities with polarization splitting, interference oscillations in the THz range can be observed
- Analytical models can explain transmission behavior
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Experimental upconversion intensity vs. wavelength and delay time for one (a) or two (b) cavity modes.
The beating frequency for two modes in panel (b) is 1.25 THz.
From [Gehlhaar et al. 2006].
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