Hidden information in fluctuation in small systems

Abstract

The exploration of the rich dynamics of electrons is a frontier in fundamental nano-physics. The dynamical behavior of electrons is dominated by random and chaotic thermal motion with ultrafast ($\approx$ ps) and nanoscale scatterings. This generates fluctuating electromagnetic fields in close vicinity of the moving electrons. W studied this fluctuation in small structures and found that its spatial distribution is not uniform, the magnitude of the fluctuation depends on external parameters such as the size ( ~1 $\mu m$) and the shape of the structure and changes can occur by an order of magnitude. Our work opens the possibility of improving the signal to noise ratio in small devices and in manipulating microscopic electron kinematics through nano-optical techniques and to applications in thermal detectors and photothermal photovoltaics.

References in corpus (4)

• Imaging non-local electron transport via local excess noise
• Measurement of non-monotonic Casimir forces between silicon nanostructures
• Scattering of electromagnetic waves from a cone with conformal mapping: application to scanning near-field optical microscope
• Generalization of conformal mapping to scattering of electromagnetic waves from surfaces: An example of a triangle

Cited by in corpus (1)

• Local density of states above a disk -- geometrical vs. thermal boundary conditions