  The optical binding of many particles has great potential to achieve the
wide-area formation of a "crystal" of small materials. Unlike conventional
optical binding, where the whole assembly of targeted particles is irradiated
with light, if one can indirectly manipulate remote particles using a single
trapped particle through optical binding, the degrees of freedom to create
ordered structures will be greatly enhanced. In this Letter, we theoretically
investigate the dynamics of the assembly of gold nanoparticles that is
manipulated using a single particle trapped by a focused laser. As a result, we
demonstrate that the spin--orbit coupling and angular momentum generation of
light via scattering induce the assembly and rotational motion of particles
through indirect optical force. This result opens the possibility of creating
ordered structures with a wide area and manipulating them, controlling local
properties using scanning laser beams.
