Fig. 1. Mechanisms of two dual-beam super-resolution optical recording technologies. (a) SPIN-based; (b) STED-based

Fig. 2. Dot size and monomer conversion rate versus depletion or inhibition beam power under single photon absorption mode. (a) Dot size versus depletion beam power in STED-based dual-beam super-resolution optical recording technology; (b) dot size versus depletion beam power in SPIN-based dual-beam super-resolution optical recording; (c) monomer conversion rates under a series of depletion beam powers in STED-based dual-beam super-resolution optical recording technology

Fig. 3. Dot resolution as a function of the depletion or inhibition beam power under single photon absorption mode. (a) STED-based dual-beam super-resolution optical recording technology; (b) SPIN-based dual-beam super-resolution optical recording technology

Fig. 4. Monomer conversion rate at different depletion or inhibition beam power for four dots recording under single photon absorption mode. (a) The depletion beam power is 0 mW; (b) the depletion beam power is 2 mW; (c) the depletion beam power is 5 mW; (d) the depletion beam power is 7 mW; (e) the depletion beam power is 10 mW ; (f) the inhibition beam power is 0 μW; (g) the inhibition beam power is 6 μW; (h) the inhibition beam power is 12 μW; (i) the inhibition beam power is 24 μW; (j) the inhibitio

Fig. 5. Monomer conversion rate at different inhibition or depletion beam power for nine dots recording under single photon absorption mode. (a) The depletion beam power is 0 mW; (b) the depletion beam power is 2 mW; (c) the depletion beam power is 5 mW; (d) the depletion beam power is 7 mW; (e) the depletion beam power is 10 mW; (f) the inhibition beam power is 0 μW; (g) the inhibition beam power is 6 μW; (h) the inhibition beam power is 12 μW; (i) the inhibition beam power is 24 μW; (j) the inhibition

Fig. 6. Profiles of monomer conversion rate for single dot recording under single photon absorption mode. (a) STED-based dual-beam super-resolution optical recording technology; (b) SPIN-based dual-beam super-resolution optical recording technology

Fig. 7. Variations in recording dot size and resolution with depletion or inhibition beam power under two-photon absorption mode. (a) STED-based dual-beam super-resolution optical recording technology; (b) SPIN-based dual-beam super-resolution optical recording technology

Fig. 8. Comparison of experiment and simulation results obtained by STED-based dual-beam super-resolution optical recording technology under two-photon absorption mode

Fig. 9. Comparison of experiment and simulation results of SPIN-based dual-beam super-resolution optical recording technology under two-photon absorption mode. (a) Scanning electron microscope image of the recording dots; (b) comparison of recording dot size; (c) comparison of recording dot resolution