  We explore the coherent destruction of tunneling (CDT) in a lattice array
under selective in-phase harmonic modulations, in which some selected lattice
sites are driven by in-phase harmonic oscillating fields and other lattice
sites are undriven. Due to the occurrence of CDT, if the driving amplitude $A$
and the driving frequency $\omega$ are tuned to satisfy the zeroth-order Bessel
function $J_0(A/\omega)=0$, the driven lattice sites are approximately
decoupled with the undriven lattice sites. The CDT even takes place in lattice
systems with high-order couplings between non-nearest lattice sites. By using
the CDT, we propose a scheme for realizing directed transport of a single
particle. It is possible to observe the CDT in the engineered optical waveguide
array, which provides a new opportunity for controlling light propagation and
designing switch-like couplers.
