Forum:Can a lightsaber be made?

Is the Star Wars lightsaber as envisioned by George Lucas just a thing of fantasy, or can it be made? We all know about the replica lightsabers which are just illuminated tubes on a handle. However, is it possible to create some sort of beam, wether it be reflected light, lasers, or magnetized plasma, powerful enough to cut through various materials? Could this beam be used and stored safely? Could the vast energy sources needed to power this mystical weapon become portable? Many people have wondered this throughout Star Wars history, and surely everyone who has seen Star Wars wishes to wield a lightsaber themselves. Can it be done?