Title :
Subpicosecond photoconducting dipole antennas
Author :
Smith, Peter R. ; Auston, David H. ; Nuss, Martin C.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
Photoconducting antennas have been demonstrated which are capable of generating and coherently detecting subpicosecond electrical pulses. These antennas, when illuminated with femtosecond optical pulses, radiate electrical pulses which have frequency spectra that extend from <100 GHz to >2 THz. Microscope dipoles measuring 50, 100, and 200 mu m have been fabricated and tested. Integrated photoconductors of radiation-damaged silicon-on-sapphire were used both for impulsive current excitation of the transmitting antennas as well as for gating the receiving antennas.<>
Keywords :
broadcast antennas; dipole antennas; photoconducting devices; receiving antennas; 100 GHz to 2 THz; 100 micron; 200 micron; 50 micron; SOS; Si-Al/sub 2/O/sub 3/; femtosecond optical pulses; frequency spectra; gating; impulsive current excitation; integrated photoconductors; microscopic dipoles; photoconducting dipole antennas; radiation damaged Si on sapphire; receiving antennas; subpicosecond electrical pulses; transmitting antennas; Antenna measurements; Dipole antennas; Frequency; Microscopy; Optical pulse generation; Optical pulses; Photoconductivity; Receiving antennas; Transmitting antennas; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
