Quantum Interference of Tunably Indistinguishable Photons from Remote Organic Molecules

Abstract

We demonstrate two-photon interference using two remote single molecules as bright solid-state sources of indistinguishable photons. By varying the transition frequency and spectral width of one molecule, we tune and explore the effect of photon distinguishability. We discuss future improvements on the brightness of single-photon beams, their integration by large numbers on chips, and the extension of our experimental scheme to coupling and entanglement of distant molecules.

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

“…Our modified Hong-OuMandel scheme measures the coincidence counts when two photons leave at the same side of a 50:50 beamsplitter, and the second order correlation functions for the two-photon interference effect between two emitters with orthogonal ( ) and parallel ( ∥ ) polarized photons are given by [47][48][49] (1)…”

Nonlinear optical signals and spectroscopy with quantum light

“…In the high-temperature limit k B T Λ α we have is governed by an effective PDC Hamiltonian (Dorfman and Mukamel, 2012b). Bath effects can become important for remote emitters and have been introduced phenomenologically (Lettow et al, 2010) below. We present a microscopic description of PCC with bath fluctuations by formulating the signal in the joint field-matter space measured by simultaneous time-and-frequency resolved detection.…”

“…The resonant case is especially important for potential spectroscopic applications (Mukamel, 1995), where unique information about entangled matter (Lettow et al, 2010) can be revealed. Other examples are molecular aggregates and photosynthetic complexes or biological imaging .…”

“…Temporally and spectrally resolved measurements can reveal important matter information. Recent single photon spectroscopy of single molecules (Fleury et al, 2000;Lettow et al, 2010;Rezus et al, 2012) call for an adequate microscopic foundation where joint matter and field information could be retrieved by a proper description of the detection process. A microscopic diagrammatic approach may be used for calculating time-and-frequency gated photon counting measurements (Dorfman and Mukamel, 2012a).…”

“…Eqs. (283) - (285) are simulated below using the typical parameters of the two photon interference experiments (Ates et al, 2012;Bernien et al, 2012;Coolen et al, 2008;Lettow et al, 2010;Patel et al, 2010;Sanaka et al, 2012;Santori et al, 2002;Sipahigil et al, 2012;Trebbia et al, 2010;Wolters et al, 2013). Photon indistinguishability depends on the molecular transition frequencies.…”