Method to map individual electromagnetic field components inside a photonic crystal
| Abstract | We present a method to map the absolute electromagnetic field strength inside photonic crystals. We apply the method to map the dominant electric field component Ez of a two-dimensional photonic crystal slab at microwave frequencies. The slab is placed between two mirrors to select Bloch standing waves and a sub-wavelength spherical scatterer is scanned inside the resulting resonator. The resonant Bloch frequencies shift depending on the electric field at the position of the scatterer. To map the electric field component Ez we measure the frequency shift in the reflection and transmission spectrum of the slab versus the scatterer position. Very good agreement is found between measurements and calculations without any adjustable parameters. |
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| Authors | T. Denis, B. Reijnders, J. H. H. Lee, P. J. M. van der Slot, W. L. Vos, and K.-J. Boller |
| Year of publication | 2012 |
| Date published | 09/2012 |
| Journal | Opt. Express |
| Volume | 20 |
| Pages | 22902-22913 |
| DOI number | 10.1364/OE.20.022902 |
| Keywords | Bloch mode, near-field optics, photonic crystal, spatial mode distribution |