The spectral location of terahertz radiation, between optical and microwave frequencies, has hindered the development of compact semiconductor terahertz sources. One approach is to make use of photonic-crystal structures, which allows surface emission of radiation so that the spectral and spatial modes can be simultaneously engineered. To fabricate electrically-driven devices, it is necessary to define boundary structures around the active, pumped area and this paper now demonstrates a general technique to implement such boundaries.
- Y. Chassagneux
- R. Colombelli
- A. G. Davies
