Stilbene Solid Lasers

Fig. 3 Charge transfer in DNA hairpins after photoexcitation of stilbene linker (St) by a laser pulse [45]. A hole, first, undergoes a transition from photoexcited St to the adjacent GC pair as shown by the solid arrow. Then it can either hop to next GC pairs (dot-dashed arrow) or return to St with the subsequent electron-hole recombination (dotted arrow)...

When preparing solid-state thin films on second-order DFB substrates, Spiro-6laser gain material in the deep blue wavelength range between 401 and 434 nm [58], This tuning range can be extended by utilizing another spiro-linked material as a dopant in Spiro-64>T. Recently, we were able to demonstrate the applicability of the stilbene-based Spiro-DPVBi for this purpose [25]. 

Figure 13-21. (a) Schematic illustration of a dye-infiltrated opalphotonic crystal usedfor measuring lasing action in the [111] direction, (b) the [111] laser emission spectrum (solid curve) and optical density spectrum for an Oxazine 725 dye-infiltrated opal, and (c) the laser emission spectrum (solid curve) and optical density spectrum (dotted curve) for a [2 2 0] Stilbene 420 dye-infiltrated opal (Shkunov, 2002). 

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