Photonic terahertz-wave generation, radiation and quasioptical integration
Licentiatavhandling, 2007

This thesis deals with the uni-travelling-carrier photodiode (UTC-PD) based photonic generation of terahertz waves, antenna designs for the terahertz radiation and a novel catadioptric lens for quasioptical integration. The ongoing and accomplished research work on the UTC-PD, its limitations and optimisation scopes for attaining higher bandwidth and higher output power have been discussed. An equivalent circuit of the UTC-PD is also proposed and has been fitted to S11 measurements up to 67 GHz. Several plausible quasioptical and non-quasioptical integration schemes for different UTC-PD application areas have also been discussed. Optimising for output power requires careful tradeoffs involving the epitaxial layer design, optical coupling, circuit design and antenna design. Considering the tradeoffs, several schemes for free-space THz generation and waveguide integration techniques have been discussed. A novel catadioptric lens which is suitable for microwave and terahertz applications, for instance near-field imaging, has been presented. The focusing property of the lens has been investigated using a 3D full-wave electromagnetic solver. Furthermore, the proposed catadioptric lens has been designed and fabricated from Delrin. Simulation and measurement results have been presented.

semiconductor device modelling

semiconductor diodes

III-V semiconductors

Catadioptric lens

imaging

dipole antennas

slot antennas

lens antennas

semiconductor heterojunctions

dielectric loaded antennas

optical mixers

photomixers

near-field imaging

computer aided engineering

indium compounds

millimetre wave imaging

near-field optics

submillimeter wave generation

photodiodes

terahertz sources

millimetre wave generation

submillimetre wave integrated circuits

microwave imaging

uni-travelling-carrier photodiodes

Kollektorn (A423), MC2, Chalmers, Kemivägen 9, Göteborg.
Opponent: Dr. Stellan Jacobsson, Food Radar Systems AB, c/o SIK, SE- 402 29 Göteborg.

Författare

Biddut Kumar Banik

Chalmers, Teknisk fysik, Fysikalisk elektronik

A novel catadioptric dielectric lens for microwave and terahertz applications

Microwave and Optical Technology Letters,; Vol. 50(2008)p. 416-419

Artikel i vetenskaplig tidskrift

Ämneskategorier

Telekommunikation

Annan elektroteknik och elektronik

Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology: 104

Kollektorn (A423), MC2, Chalmers, Kemivägen 9, Göteborg.

Opponent: Dr. Stellan Jacobsson, Food Radar Systems AB, c/o SIK, SE- 402 29 Göteborg.