Fiber-Coupled 2-D n-i-pn-i-p Superlattice Photomixer Array
| Autor: | Stefan Malzer, Arthur C. Gossard, L. Enrique Garcia-Munoz, Alejandro Rivera-Lavado, Christian Muller-Landau, Hong Lu, Gottfried H. Döhler, Daniel Segovia-Vargas, Sascha Preu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Terahertz radiation business.industry Superlattice Beam steering Physics::Optics Near and far field 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Collimated light Photodiode law.invention 010309 optics Lens (optics) Optics Interference (communication) law 0103 physical sciences Optoelectronics Electrical and Electronic Engineering 0210 nano-technology business |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 65:3474-3480 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2017.2700039 |
| Popis: | We have fiber-coupled an array of n-i-pn-i-p superlattice photomixers using a fiber array of same pitch of 145 $\mu \text{m}$ . We experimentally investigate the effect of the finite size of the implemented silicon lens on the interference between the array elements in the far field. We compare the results from a geometry optimized for a collimated terahertz (THz) beam to theory and simulations. Further, beam steering is demonstrated by controlling the optical phase of the individual photomixers. Due to broadband antennas attached to each array element, the array is frequency tunable. It is exemplarily characterized at 165 and 310 GHz. Such arrays can overcome power limitations of individual photomixers. In contrast to bulky individually packaged free space solutions, this array can be packaged to a compact terahertz source, limited in size only by the size of the silicon lens. The investigated $2 \times 2$ array features a spot diameter (full-width at half-maximum) of 12.1 mm at a distance of 19 cm at 310 GHz with a silicon lens of only 20-mm diameter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|