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Phase- and voltage bias-sensitive quasiparticle transport at a double$NIS_1IS_2$ interface is considered. The barriers $I$ range from tunnel totransparent, and the intermediate region $S_1$ has a width comparable to thesuperconducting coherence length. A phase difference $\varphi$ is applied tothe Josephson junction $S_1IS_2$. The normal and Andreev reflections at the$NIS_1$ interface become $\varphi$-sensitive, and transport is governed byinterferences within the narrow $S_1$ region, both in the normal and anomalouschannels. The subgap conductance is separately (energy $E$)- and (phase$\varphi$)- symmetric. Above the superconducting gap, the conductance is ingeneral not symmetric even if $(E,\varphi)$ is changed in $(-E,-\varphi)$, butthe symmetry is restored by averaging Fermi oscillations. The Tomaschoscillations are amplified by the phase difference. The subgap conductanceexhibits a resonant structure at the energy of the Andreev bound states (ABS)of the $S_1IS_2$ junction, providing a side-spectroscopy of such states.Depending on the relative transparencies of the junctions, the resonance canincrease or reduce the conductance, and it can even vanish for $\varphi=\pi$,featuring total reflection of quasiparticles at $NS_1$ by the ABS at $S_1S_2$.

Phase-sensitive transport at a normal metal-superconductor interface close to a Josephson junction