Hot-Band Absorption Can Mimic Entangled Two-Photon Absorption
- URL: http://arxiv.org/abs/2111.05946v2
- Date: Sun, 30 Jan 2022 10:36:13 GMT
- Title: Hot-Band Absorption Can Mimic Entangled Two-Photon Absorption
- Authors: Alexander Mikhaylov, Ryan N. Wilson, Kristen M. Parzuchowski, Michael
D. Mazurek, Charles H. Camp Jr, Martin J. Stevens and Ralph Jimenez
- Abstract summary: We investigated the fluorescence signals from Rhodamine 6G and LDS798 excited with a CW laser or an entangled photon pair source at 1060 nm.
We observed a signal that originates from hot-band absorption (HBA), which is one-photon absorption from thermally-populated vibrational levels of the ground electronic state.
For the typical conditions under which E2PEF measurements are performed, contributions from the HBA process could lead to a several orders-of-magnitude overestimate of the quantum advantage for excitation efficiency.
- Score: 52.77024349608834
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: It has been proposed that entangled two-photon absorption (E2PA) can be
observed with up to 10 orders of magnitude lower photon flux than its classical
counterpart. However, there is a significant controversy regarding the
magnitude of this quantum enhancement in excitation efficiency. We investigated
the fluorescence signals from Rhodamine 6G and LDS798 excited with a CW laser
or an entangled photon pair source at 1060 nm. We observed a signal that
originates from hot-band absorption (HBA), which is one-photon absorption from
thermally-populated vibrational levels of the ground electronic state. This
mechanism, which has not been previously discussed in the context of E2PA,
produces a signal with a linear power dependence, as would be expected for
entangled two-photon excited fluorescence (E2PEF). For the typical conditions
under which E2PEF measurements are performed, contributions from the HBA
process could lead to a several orders-of-magnitude overestimate of the quantum
advantage for excitation efficiency.
Related papers
- Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride [62.170141783047974]
Single photon emitters hosted in hexagonal boron nitride (hBN) are essential building blocks for quantum photonic technologies that operate at room temperature.
We experimentally demonstrate large-area arrays of plasmonic nanoresonators for Purcell-induced site-controlled SPEs.
Our results offer arrays of bright, heterogeneously integrated quantum light sources, paving the way for robust and scalable quantum information systems.
arXiv Detail & Related papers (2024-05-03T23:02:30Z) - Experimental Upper Bounds for Resonance-Enhanced Entangled Two-Photon
Absorption Cross Section of Indocyanine Green [0.0]
Resonant intermediate states have been proposed to increase the efficiency of entangled two-photon absorption (ETPA)
We investigate for the first time r-ETPA in an organic molecular dye, indocyanine green (ICG), when excited by broadband entangled photons in near-IR.
arXiv Detail & Related papers (2023-12-22T02:15:22Z) - Two-photon absorption cross sections of pulsed entangled beams [0.0]
Entangled two-photon absorption (ETPA) could form the basis of nonlinear quantum spectroscopy.
We show that quantum-enhanced cross sections can persist even to very large photon numbers.
arXiv Detail & Related papers (2023-11-30T19:57:41Z) - Witnessing Entangled Two-Photon Absorption via Quantum Interferometry [0.0]
In this work, we focus on transmission measurements of entangled two-photon absorption (eTPA)
We demonstrate that the so-called N00N-state configuration is the only one amongst those considered insensitive to linear (single-photon) losses.
Our results show that N00N states may become a potentially powerful tool for quantum spectroscopy, and place them as a strong candidate for the certification of eTPA in an arbitrary sample.
arXiv Detail & Related papers (2022-08-24T09:11:10Z) - Spatial properties of entangled two-photon absorption [0.0]
We experimentally study entangled two-photon absorption in Rhodamine 6G as a function of the spatial properties of a high flux of broadband entangled photon pairs.
We demonstrate a key signature dependence of the entangled two-photon absorption rate on the type of entangled pair flux attenuation.
arXiv Detail & Related papers (2022-06-01T13:56:40Z) - Silicon nitride waveguides with intrinsic single-photon emitters for
integrated quantum photonics [97.5153823429076]
We show the first successful coupling of photons from intrinsic single-photon emitters in SiN to monolithically integrated waveguides made of the same material.
Results pave the way toward the realization of scalable, technology-ready quantum photonic integrated circuitry.
arXiv Detail & Related papers (2022-05-17T16:51:29Z) - Quantum Borrmann effect for dissipation-immune photon-photon
correlations [137.6408511310322]
We study theoretically the second-order correlation function $g(2)(t)$ for photons transmitted through a periodic Bragg-spaced array of superconducting qubits, coupled to a waveguide.
We demonstrate that photon bunching and anti-bunching persist much longer than both radiative and non-radiative lifetimes of a single qubit.
arXiv Detail & Related papers (2020-09-29T14:37:04Z) - Optical repumping of resonantly excited quantum emitters in hexagonal
boron nitride [52.77024349608834]
We present an optical co-excitation scheme which uses a weak non-resonant laser to reduce transitions to a dark state and amplify the photoluminescence from quantum emitters in hexagonal boron nitride (hBN)
Our results are important for the deployment of atom-like defects in hBN as reliable building blocks for quantum photonic applications.
arXiv Detail & Related papers (2020-09-11T10:15:22Z) - Setting bounds on two-photon absorption cross-sections in common
fluorophores with entangled photon pair excitation [48.7576911714538]
We use a fluorescence-based registration scheme to experimentally determine upper bounds on the cross-sections for six fluorophores.
For two samples that have been studied by others, Rhodamine 6G and 9R-S, we measure upper bounds four and five orders of magnitude lower than the previously reported cross-sections.
arXiv Detail & Related papers (2020-08-06T13:53:16Z) - Two-photon pumped exciton-polariton condensation [0.0]
We report the first observation of two-photon pumped polariton condensation, demonstrated by angle-resolved photoluminescence in a GaAs-based microcavity.
Our results pave the way towards novel polariton-based sources and solid-state coherent control of collective quantum states with individual two-level systems.
arXiv Detail & Related papers (2020-05-04T18:00:01Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.