Abstract
The possibility of second-harmonic generation based on surface dipole and bulk multipole nonlinearities in
silica nanowires is investigated numerically. Both circular and microstructured nanowires are considered.
Phase matching is provided by propagating the pump field in the fundamental mode, while generating the
second harmonic in one of the modes of the LP11 multiplet. This is shown to work in both circular and microstructured
nanowires, although only one of the LP11 modes can be phase-matched in the microstructure. The prospect of obtaining large conversion efficiencies in silica-based nanowires is critically discussed, based on simulations of second-harmonic generation in nanowires with a fluctuating phase-matching wavelength. It is concluded that efficient wavelength conversion will require strong improvements in the nanowire uniformity, peak powers well in excess of 10 KW, increase of the second-order nonlinearity by an order of magnitude by use of a different base material, or highly polarizable surface coatings. © 2010 Optical Society of America
| Original language | English |
|---|---|
| Journal | Optical Society of America. Journal B: Optical Physics |
| Volume | 27 |
| Issue number | 7 |
| Pages (from-to) | 1317-1324 |
| ISSN | 0740-3224 |
| DOIs | |
| Publication status | Published - 2010 |