I'm sure this subject has been touched. However,getting into a serious discussion on this "theoretical" weapon, is rather difficult. I am truly
hoping to make progress into this endeavor.
The basics of weapon use has always been oriented around creating 'an edge' in something which serves as an evener for the less capable opponent.
And an overwhelming advantage to the strong.
Without necessarily requiring skill to offset lack of physical ability.
The progression of measure-countermeasure being that which determines less 'how lethal' than 'who hits' these systems are.
Swordwork probably falls under this category in that a heavy blade can kill a man in an instant and is largely unstoppable by the musculature and
skeletal strength of a smaller opponent trying to deflect or capture it with a dueling weapon.
Yet if he sacrifices everything for 'that ONE moment' he can step through his enemy's (OODA loop) circle to land a penetrating blow on a spot the
size of a dime which kills the heart or brain and ends the fight.
At which point the sword-as-club wielder asks himself how much of his already lagging speed he would sacrifice to wear armor sufficient to stop the
light blade. As a function of whether the smaller opponent can afford to wait (stroke after stroke, 'void' miss or be crippled and/or killed)
tiring him out.
And the light blade wielder looks in his grinning-mountain opponent's gleaming eyes and screams "Run Awaaaay!".
At least until he can build a gun.
Lightsabers, because they do not magnify their wielder's kineticism through mass-inertia, turn all this on it's head. Whereby the small man can
choose the biomechanical blocking angles and blade-lock capture points (leverage as a point /along/ your opponent's blade) which lets him beat ONLY
the physical power of a larger opponent. Since armor does him no good.
While the larger opponent can shift to dual wield or dual-grip to compensate for his own large=slower mass in beating him off before swinging his own
weapon 'around the outside' to tap junior from behind at the limits of his arms arcing reach.
9 times out of 10, the big man will still win, if he fights dirty. But even so, the lightsaber represents one of the more 'honorable' (evenly
balanced) weapons designs created to encourage opponents to, if not refrain from slaughtering each other. Then at least to not involve others.
I have often wondered if every man who felt the urge was freely given a lightsaber to magnify his manhood with the _sole condition_ that he could only
kill or be killed (no bullying or intimidation) another saber wielder might not feel more at home with his base instincts.
Indeed, they are also discrete enough to not be overtly intimidating for carriage which is also a source of "I can, you can't" envy and conflict
For these notions alone, Mr. Lucas has my admiration 'as a philosopher'.
OTOH, he blew great bloody chunks when he tried to intimate that a sword could block great bloody barrages of blaster bolts 'from all angles' and
ended up with firefights that looked like they belonged in the bolt action if not muzzle loader eras.
Use The Force Luke! Snicker. KPl.
Having said that, these are the places I would begin in a search for 'how to make a lightsaber'...
Star Wars Technical Commentaries,
I can't find it but Mr. Saxton once pointed me to a section on blaster weapons and some of the problems with 'solid plasma'. This would likely
apply to Lightsabers that use similar energy sources
Can A Lightsaber Be Made
Duality. A Reminder of Mortalities Waste In Combat
And How To Look Like What You Will Never Be.
P.S. I know the above doesn't really help much. Given what I now know about plasma as a weaponizable 'solid', I must confess that my belief is
more towards something like a Klein Bottle which somehow (string theory?) 'dumps' energy from the same spatial interstice as involves FTL travel.
i.e. An energy which comes 'up' the geometric twist of a superluminal space-time, stable in it's own existence, only to _terminate_ (self
annihilate, unable to accomodate this-world physics) around the outer edge radius of bottle field.
In such a scenario. the 'light' produced is more a side effect like the event horizon radiation around a blackhole.
It is convenient for not having to name much less /contain/ any particular particle-mass (tachyon, neutrino, take your pick) while at the same time
creating a cutting edge that conveniently disappeared back into alternate-whatever as soon as it stabilized.
The closest I can theorize an image to would be some kind of chain saw like effect wherein the blade bent back in upon itself as both the source and
the return point of the teeth in the spinning blade.