  We propose and investigate a new type of optical waveguide made by an array
of atoms without involving conventional Bragg scattering or total internal
reflection. A finite chain of atoms collectively coupled through their
intrinsic resonance supports a propagating mode with minimal radiative loss
when the array spacing $a$ is around 0.6$\lambda_0/2\pi$ where $\lambda_0$ is
the wavelength of the nearly resonant optical transition. We find that the
transportation is robust with respect to position fluctuation and remains
possible when the atoms are placed on a circle. Our result paves the way to
implement the subwavelength transportation of light in integrated optical
circuits with cold atoms.
