META Conference, META'12

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Near field Thermal signal detected by a dipolar tip
Karl Joulain, Yannick De Wilde, Arthur Babuty, Pierre-Olivier Chapuis, Philippe Ben-Abdallah, Jean-Jacques Greffet

Last modified: 2012-01-06


In this work, we show how an electric and magnetic dipolar particle has its polar- izability that is changed in a non-vacuum environment. This result is used to calculate the signal obtained by an apertureless Scanning Near-Field Optical Microscope (SNOM) when the tip is a dipolar particle. This signal only depends on the field without tip and on the particle and surface optical properties. We apply our theory results to the case of a thermally excited surface. We show that the measure obtained is a local surface spectroscopy.


nanophotonics; spectroscopy