A nano-colonnade VCSEL device and a method of fabrication utilize a
nanowire column grown nearly vertically from a (111) horizontal surface
of a first layer to another horizontal surface of a second layer to
connect the layers. The VCSEL device includes a first layer having the
(111) horizontal surface; a second layer; and an insulator support
between the first layer and the second layer that separates the first
layer from the second layer. A portion of the second layer overhangs the
insulator support, such that a horizontal surface of the overhanging
portion is spaced from and faces the (111) horizontal surface of the
first layer. The VCSEL device further includes a nanowire column
extending nearly vertically from the (111) horizontal surface to the
facing horizontal surface, and distributed Bragg mirrors adjacent to
opposite end of the nanowire column.