Laser scanning effect

I want to create a laser scanning effect similar to this;

I don’t want it to have a waving effect like that one; just a simple flat plane that scans the room. The tricky part is that I want it to outline every mesh object it intersects. Is there a simple way to do this for mobile?

I would use a projector with a cookie constraining it to a line.

A light with soft shadows would do a good job to.

As for the in air glow perhaps you should try and use a asset like Unity3D Extension: Volumetric Light Beam Kit - YouTube

A particle effect with world collision enabled and a submitter on collision?

Now that I write that down it could be rather expensive.