Figure 4. Spatial dependence of detector response.

(a) Measured spatial dependence of normalized detector responses at zero-bias V_gen→0 and T=61 K. (b) Spatial dependencies of peak amplitudes in detector responses at sum-gap voltages in the generator. Note the exponential decay of detector responses with the characteristic decay length x_τ∼μm. (c) Simulated temperature distribution on heat (phonon) spreading without decay (infinite bosonic lifetime). Note a significantly weaker spatial dependence than in the experiment.