Fig. 1.

(A) Schematic of the interferometry-based confocal microscope. The birefringent interferometer (TWINS) creates two time-delayed, copropagating beam replicas from the output of the white-light source (WLS). See text for details. (B) Image of a 15 × 15-μm region of the TDI sample; each “spot” corresponds to an SM. (C) Photon antibunching data from a single bright spot. The lack of signal at 3.9 μs, corresponding to the detection delay between the APD detectors, demonstrates that it originates from a single emitter. (D) Laser spectra at several interferometer wedge positions. A sinusoidal interference pattern appears in the spectrum with fringe density increasing proportionally to the time delay between the beam replicas.