We present a dipole-on-dielectric model for lithographic antennas used
for bolometer coupling in the infrared. The predicted antenna pattern
s show good agreement with measurements of Au-on-Si spiral antennas at
9.5-mu m wavelength. Angle- and polarization-resolved measurements ar
e proposed, which will further probe the behavior of these antenna str
uctures and facilitate refinement of the analytical models. (C) 1996 O
ptical Society of America