A CW photoconductive integrated photomixer/antenna THz source

A new CW photoconductive integrated photomixer/antenna THz source is presented. A THz signal is generated in the DC-biased photoconductive strip by employing optical heterodyne photomixing, and at the same time the size of the photoconductive strip on the grounded dielectric substrate is designed to have an efficient broadside radiation. Analytical expressions for the photo-induced current as well as the radiation power are calculated in detail, which make it possible to evaluate the performance of the structure made by different photoconductive materials. The typical μW output power can be obtained by mW laser pump power for frequencies up to 1 THz.

[1]  D. Auston,et al.  Picosecond optical electronic sampling: Characterization of high‐speed photodetectors , 1982 .

[2]  G. J. Simonis,et al.  Optical generation, distribution, and control of microwaves using laser heterodyne , 1990 .

[3]  David R. Jackson,et al.  A comparison of CAD models for radiation from rectangular microstrip patches , 1991 .

[4]  Li.  Phototransport under the presence of a small steady-state photocarrier grating. , 1990, Physical review. B, Condensed matter.

[5]  M. Tani,et al.  Generation of CW THz radiation by optical heterodyne with diode lasers and LTG-GaAs photoconductors , 1996, International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153).

[6]  D. Saeedkia,et al.  High-Temperature Superconductive Photomixer Patch Antenna: Theory and Design , 2003 .

[7]  Masahiko Tani,et al.  Generation of coherent terahertz radiation by photomixing of dual-mode lasers , 2000 .

[8]  Chi H. Lee,et al.  Picosecond Photoconductivity And Its Applications , 1981, Photonics West - Lasers and Applications in Science and Engineering.

[9]  M. Teich.  FIELD‐THEORETICAL TREATMENT OF PHOTOMIXING , 1969 .

[10]  Ley,et al.  Analysis of the moving-photocarrier-grating technique for the determination of mobility and lifetime of photocarriers in semiconductors. , 1995, Physical review. B, Condensed matter.

[11]  K. Inagaki,et al.  400 Mbit/s BPSK data transmission at 60 GHz-band MM-wave using a two-mode injection-locked Fabry-Perot slave laser , 2000, International Topical Meeting on Microwave Photonics MWP 2000 (Cat. No.00EX430).

[12]  Elliott R. Brown,et al.  THz Generation by Photomixing in Ultrafast Photoconductors , 2003 .

[13]  F. Vermeulen,et al.  Ultrafast photoconductive self-switching of subpicosecond electrical pulses , 2000, IEEE Journal of Quantum Electronics.

[14]  Masahiko Tani,et al.  Carrier Dynamics and Terahertz Radiation in Photoconductive Antennas , 2000 .

[15]  S. M. Sze,et al.  Physics of semiconductor devices , 1969 .

[16]  Simon Verghese,et al.  Highly tunable fiber-coupled photomixers with coherent terahertz output power , 1997 .

[17]  Y. Taur,et al.  A Laser-Induced Traveling-Wave Device for Generating Millimeter Waves , 1981 .

[18]  M. Demokan.  Invited paper. The interaction of mode-locked laser pulses with intrinsic silicon , 1981 .

[19]  Chi H. Lee.  Picosecond optoelectronic devices , 1984 .

[20]  E. Brown,et al.  Coherent millimeter‐wave generation by heterodyne conversion in low‐temperature‐grown GaAs photoconductors , 1993 .