No...these are not sweeps. I have practiced a very little bit of judo in my time, but sweeps depend on a different mechanic and usually relay motion of the leg perpendicularly to the plane of the direction your body and leg is facing. This also uses your the knife edge of the foot and the "sweeping" motion implied by the technique's name.
A cutting kick is a kick in that the direction of the snap is in line with the leg...not perpendicular or at an angle to the line of the leg as a sweep would be. In other words, think of a front snap kick, but aimed so that the snap will bring the bottom of the foot brushing against the ground for a back cutting kick. For a front cutting kick, the height would be different, and the angle would be different...but the snap would alway be in the direction of the extended leg, using the hip to turn the leg into the proper angle, not the knee.