Experimental study reveals sixty-fold photoresponse enhancement in bilayer tungsten disulfide via Bloch surface wave polaritons, indicating a viable route for chip-scale optoelectronics.
Key Points
To overcome the absorption and carrier diffusion limitations of two-dimensional transition metal dichalcogenide photodetectors using polaritonic coupling on a photonic crystal platform.
Integrated bilayer tungsten disulfide (WS2) onto a truncated one-dimensional photonic crystal to excite propagating Bloch surface wave polaritons.
Evaluated photocurrent responses across different photonic environments and correlated spatially resolved photocurrent with polariton transport measurements.
Achieved a photodetection enhancement exceeding 60-fold across a broad optical frequency spectrum.
Confirmed that the giant photoresponse is driven by high-speed, long-range polariton propagation coupled with a modified Schottky barrier.