In　the　rapidly　evolving　fields　of　Augmented　Reality　(AR)　and　Virtual　Reality　(VR),　achieving　high　diffraction　efficiency　and　a　wide　field　of　view　(FOV)　is　critical　for　enhancing　visual　experience.　This　paper　presents　a　three-layer　Polarisation　Volume　Grating　(TL-PVG)　structure　designed　to　address　the　limitations　of　single-layer　PVGs　in　AR/VR　applications.　By　stacking　multiple　PVG　layers　with　different　tilt　angles,　TL-PVG　achieves　an　expanded　angular　bandwidth　and　improved　diffraction　efficiency,　enabling　brighter　and　more　immersive　displays.　The　proposed　TL-PVG　structure　incorporates　polarisation　multiplexing　to　optimise　the　optical　diffraction　efficiency　by　approximately　75%,　thereby　enhancing　image　brightness　and　sharpness.　The　experimental　results　demonstrate　that　TL-PVG　significantly　outperforms　traditional　single-layer　PVGs,　offering　a　promising　solution　for　waveguide　elements　in　next-generation　AR/VR　displays.　This　study　provides　a　comprehensive　analysis　of　the　fabrication　process,　optical　properties,　and　applications　of　TL-PVGs,　highlighting　their　potential　to　revolutionise　the　AR/VR　technology.