TY - JOUR

T1 - Light emission probing quantum shot noise and charge fluctuations at a biased molecular junction

A1 - Schneider,N.L.

A1 - Lu,Jing Tao

A1 - Brandbyge,M.

A1 - Berndt,R.

AU - Schneider,N.L.

AU - Lu,Jing Tao

AU - Brandbyge,M.

AU - Berndt,R.

PB - American Physical Society

PY - 2012

Y1 - 2012

N2 - The emission of plasmonic light from a single C60 molecule on Cu(111) is probed in a scanning tunneling microscope from the weak-coupling, tunneling range to strong coupling of the molecule to the electrodes at contact. At positive sample voltage the photon yield decreases owing to shot-noise suppression in an increasingly transparent quantum contact. At reversed bias an unexpected nonlinear increase occurs. First-principles transport calculations reveal that ultrafast charge fluctuations on the molecule give rise to additional noise at optical frequencies beyond the shot noise of the current that is injected to the tip. © 2012 American Physical Society.

AB - The emission of plasmonic light from a single C60 molecule on Cu(111) is probed in a scanning tunneling microscope from the weak-coupling, tunneling range to strong coupling of the molecule to the electrodes at contact. At positive sample voltage the photon yield decreases owing to shot-noise suppression in an increasingly transparent quantum contact. At reversed bias an unexpected nonlinear increase occurs. First-principles transport calculations reveal that ultrafast charge fluctuations on the molecule give rise to additional noise at optical frequencies beyond the shot noise of the current that is injected to the tip. © 2012 American Physical Society.

KW - Calculations

KW - Shot noise

KW - Molecules

U2 - 10.1103/PhysRevLett.109.186601

DO - 10.1103/PhysRevLett.109.186601

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

VL - 109

ER -