Visible light communication (VLC) receivers based on luminescent waveguides can simultaneously funnel, spectrally reshape, and concentrate incident photons for high-efficiency detection. We propose a single cylindrical optical antenna made of biodegradable polyvinyl alcohol (PVA) embedded with three classes of quantum dots (QDs)–Se/SiO \({}_2\) (70 nm) and GaP/SiO \({}_2\) (75 nm, 88 nm); whose concentrations are optimized to guide and spectrally manage light from conventional LEDs to a photodetector. The cylinder geometry improves edge collection relative to sharp-edged guides and couples naturally to circular photodiodes, while the tri-QD mixture enables both faithful white-spectrum reconstruction and independent red/green/blue (RGB) channels. A Monte–Carlo (ray-tracing) framework (with optical properties drawn from our modeled QD absorption/emission) is used to evaluate edge-collected optical efficiency, spectral fidelity, and inter-channel crosstalk across quantum yield (QY) values and LED colors. This theoretical study demonstrates a single cylindrical PVA–QD VLC receiver that unifies white-LED spectrum reconstruction (TDM-style) with three-channel WDM (RGB). Monte–Carlo simulations predict one-edge optical efficiencies of 20.24% (white), 20.03% (blue), 20.45% (green), and 20.07% (red) at QY = 0.95, together with low inter-channel crosstalk (e.g., area-ratio metric \(A_{\textrm{BG}}/A_{\textrm{B}} \le 0.1854\) ) and small spectral error (RMSE \(\approx \) 0.1569 for white; 0.0942 for green).
