Patent ID: 11892529
Assignee: RENSSELAER POLYTECHNIC INSTITUTE
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 17:
18. A method of revealing excitons in a transition metal dichalcogenides comprising:
providing the transition metal dichalcogenides, the transition metal dichalcogenides comprising:
a substrate;
a bottom layer of boron nitride;
a tungsten diselenide monolayer positioned on the bottom layer of boron nitride;
a top layer of boron nitride positioned on the tungsten diselenide monolayer such that the bottom layer of boron nitride and the top layer of boron nitride at least partially encapsulate the tungsten diselenide monolayer;
a source electrode positioned on the substrate;
a drain electrode positioned on the substrate; and
a top gate electrode positioned on the top layer of boron nitride;

exposing the transition metal dichalcogenides to an external magnetic field;
emitting excitation photon energy from a broadband light source;
filtering, via a tunable filter, the excitation photon energy to a predetermined wavelength bandwidth;
linearly polarizing, via a linear polarizer, the filtered excitation photon energy;
converting, via a quarter waveplate, the linearly polarized excitation photon energy to circularly polarized excitation photon energy; and
focusing, via a 50× objective, the circularly polarized excitation photon energy to a spot size of about 2 μm onto the tungsten diselenide monolayer of the transition metal dichalcogenides.