The behavior of the resonance curve for surface plasmons in the Kretschmann geometry for palladium is theoretically studied. The existence of inverted resonance in the near-IR region is detected for a thin film of palladium. It is shown that a broadening of the resonance is observed as the frequency of inelastic collisions of electrons in the metal increases and the plasma frequency decreases. Such behavior of the resonance, associated with variation of the optical constants of the metal, can be used in hydrogen sensors based on palladium.
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