Title :
Novel Antenna-Integrated Photodiodes With Strained Absorbers Designed for Use as Terahertz Sources
Author :
Henning, Ian D. ; Adams, Michael J. ; Vaughan, Martin ; Abraham, Thomas ; Sun, Yun ; Dyson, Angela ; Moodie, David G. ; Rogers, Dave C. ; Cannard, Paul J. ; Dosanjh, Sukhjiban ; Skuse, Mark ; Firth, Richard J.
Author_Institution :
Sch. of Comput. Sci. & Electron. Eng., Univ. of Essex, Colchester, UK
Abstract :
We present experimental results on the performance of antenna-integrated photodiodes intended for use as photomixers to provide a tunable broadband source of terahertz (THz) radiation. In a balanced strain-absorber structure, we show that the introduction of strain has proved effective in enhancing the performance at frequencies above 500 GHz. A comparison of strained and unstrained devices confirms this claim. These structures are integrated with a range of antennas, including log periodic and slot-horn types, designed for wideband THz emission. Using the devices as photomixers for the outputs from a DFB laser and an external cavity laser in the 1550 nm telecom window, tunable emission is demonstrated over the range from 100 GHz to 1.8 THz.
Keywords :
broadband antennas; electromagnetic wave absorption; integrated optoelectronics; microwave photonics; optical design techniques; optical saturable absorption; optical tuning; photodetectors; photodiodes; terahertz wave devices; DFB laser; antenna-integrated photodiodes; external cavity laser; frequency 100 GHz to 1.8 THz; log periodic antennas; optical design; photodetectors; photomixers; slot-horn antennas; strained absorbers; telecom window; terahertz sources; tunable broadband source; wavelength 1550 nm; wideband THz emission; Photodetectors; planar antenna; strain; submillimeter-wave generation;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2010.2049196
