Fig. 1. Schematic diagram of the photodetector device and energy level distribution：（a）schematic diagram of the device： input optical field Sin and output optical field Sout； radiative dissipation coefficient Γr and nonradiative dissipation coefficient Γnr； cavity mode electric field Ec and vacuum Rabi frequency ΩR. （b）schematic of the energy level distribution： ground state E1， first excited state E1，collective excitation electronic energy level E2， Fermi level EF， and extraction level E3

Fig. 2. Reflectance and Absorption Efficiency of the Photodetector：（a）Reflectance spectrum under the conditions of EC=130meV， g=ΩR≈11meV， ω31=141（b）Absorption efficiency spectrum under the same conditions， with the shaded area representing Δω. The blue line denotes 1-Rω， and the red line denotes ηω； （c）Reflectance spectrum mapping obtained by varying the cavity mode frequency EC； （d）Absorption efficiency mapping obtained by varying the cavity mode frequencyEC

Fig. 3. Relationship Between Net Absorption Efficiency， Radiative Dissipation， and Coupling Strength：（a）Variation of the maximum absorption efficiency ηω with the radiative dissipation coefficient Γr， where the red dot represent theoretical predictions of the peak value.（b）Distribution of the maximum absorption efficiency under different radiative dissipation coefficients Γr and coupling strengths g. The blue solid line represents the numerical results， while the red dashed line represents the theoretical predictions

Fig. 4. Analysis of maximum photodetection response with tunneling effect and critical coupling：（a）Maximum photodetection response versus extraction energy level ω31 at g=11meV： blue line considers tunneling and critical coupling， orange line considers tunneling only， and red line ignores tunneling.（b）Percentage improvement in response with tunneling versus without tunneling.（c）Percentage improvement under new critical coupling versus tunneling only.（d）Heatmap of response improvement under the new critical coupling versus conventional critical coupling as g varies