  We demonstrate the excitation and detection of whispering gallery modes in
optical microresonators using a "point-and-play", fiber-based, optical
nano-antenna. The coupling mechanism is based on cavity-enhanced Rayleigh
scattering. Collected spectra exhibit Lorentzian dips, Fano shapes, or
Lorentzian peaks, with a coupling efficiency around 13\%. The spectra are
characterized by the coupling gap, polarization, and fiber tip position. The
coupling method is simple, low-cost and, most importantly, the
\textit{Q}-factor can be maintained at $10^8$ over a wide coupling range,
thereby making it suitable for metrology, sensing, or cavity quantum
electrodynamics (cQED) experiments.
