Spectroscopic measurements of light emitted by the scanning tunneling microscope

Luminescence experiments on supported molecules with the scanning tunneling microscope

“…It supports a localized surface plasmon resonance associated with the collective oscillation of the free conduction electrons. The geometry-and materialdependent plasmon resonance plays a crucial role in the two 2 The average plasmon frequency for a given combination of the tip and sample material can be expressed as: ω P = [2ω 2 1 ω 2 2 /(ω 2 1 + ω 2 2 )] 1/2 , where ω 1 is the bulk plasmon frequency of the particle and ω 2 is the bulk plasmon frequency of the sample [64]. enhancement processes (excitation and radiation) [27,28].…”

Cherenkov Effect in the Context of Scanning Tunneling Microscopy

“…The spectrum of light from a Au-Au junction in air was studied in [7]. The light was detected in the spectral range from 1.5 to 1.7 eV.…”

A far-field optical microscope with nanometre-scale resolution based on in-plane surface plasmon imaging

“…Let us consider a far-field twodimensional (2D) optical microscope made of such droplets or any other appropriately shaped planar dielectric lenses and/or mirrors as shown in Fig.1(a). Since the wavelength of surface plasmons λ p observed in the STM light emission 7 and near-field optical experiments 8 may be as small as a few nanometers (hence n eff = λ/λ p may reach extremely large values up to 10 2 ), the diffraction limit of resolution of such a 2D microscope may approach λ p /2 or λ/2n eff . Theoretically it may reach a scale of a few nanometers.…”