Generation of quasi-coherent cylindrical vector beams by leaky mirrorless laser
Tal Ellenbogen, Dongxing Wang, Kenneth B Crozier
OPTICS EXPRESS | OPTICAL SOC AMER | Published : 2012
We demonstrate that cylindrical vector beams with radial and azimuthal polarization states can be generated by leaky emission from photoexcited molecules embedded in slab-optical-waveguides which are formed on thin metal films on glass. Mirrorless lasing action in the optical waveguide leads to an order-of-magnitude collapse of the emission energy bandwidth and an emission directionality enhancement exceeding three-fold. This leads to the creation of fine rings of quasi-coherent light with radial and azimuthal polarizations. We study the effect of the leakage loss on the amplified spontaneous emission process and on the photon yield. We find a critical value of metal film thickness for the o..View full abstract
Awarded by U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences
Awarded by National Science Foundation (NSF)
This work was funded by the Center for Excitonics, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences under Award Number DE-SC0001088. KC and DW also acknowledge funding from the National Science Foundation (NSF, grant number ECCS1201687). Fabrication work was carried out at the Harvard Center for Nanoscale Systems, which is supported by the NSF.