I don't know about that specific item.
But in Ghostbusters it's surprising how much "scientific" thought has gone into the make believe ghost capturing elements.
If the Luigi tool is similar to the Ghostbusters (muon) trap it could purport to work on the principle that spectral emanations alter the spacetime around them in a certain way. In Ghostbusters for example ionizing the air in which they manifest. The proton /positron combination (whiteorange/blue) streams are used to physically manipulate this region of ionized space (containing the spectral emanation) by way of an attractive force.
This movement while incarcerated depletes the energy of the entity. Then a muon trap is used which introduces a field of ionising radiation by muon decay (steered by hollow lasers) which attracts the spectral ionised entity. This field is reduced in size by the hollow lasers steering until it is shrunk down inside the shielding area of the cartridge. Here the radiation field is maintained depending on the level of charge of the trap (that nrads dial on the front of the trap), by balancing the required ionising radiation absorption dose to the level of charge the trap currently has.
Here's a thread that details that:
From how the proton packs work, to the neutrona wands, the muon trap, etc. There are many threads on this forum and there is the awesome Ghostbusters Operations manual v89 and v91.