Entangled light–matter interactions and spectroscopy

Szoke, Szilard; Liu, Hanzhe; Hickam, Bryce P.; He, Manni; Cushing, Scott K.

doi:10.1039/d0tc02300k

Cited by 45 publications

(40 citation statements)

References 132 publications

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“…When molecular vibrational modes are strongly coupled to the cavity modes, they form hybridized quasiparticles–molecular vibrational polaritons. [ 17–40 ] Using a coupled dual‐cavity polariton platform, [ 17 ] we previously demonstrated that nonlinear interactions in the system can be delocalized, through exciting the dark state populations. However, it is insufficient to realize coherence transfer because, unlike dark states, polariton coherences are much shorter lived and are vulnerable to solvent fluctuations across spaces.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Coherence Delocalization in Real Space Simulated by Polaritons

Xiang

Yang

You

et al. 2022

Advanced Optical Materials

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Coherence delocalization has been investigated on a coupled‐cavity molecular polariton platform in time, frequency, and spatial domains, enabled by ultrafast two‐dimensional infrared hyperspectral imaging. Unidirectional coherence delocalization (coherence prepared in one cavity transferred to another cavity) has been observed in frequency and real space. This directionality is enabled by the dissipation of delocalized photon from high‐energy to low‐energy modes, described by Lindblad dynamics. Further experiments show that when coherences are directly prepared between polaritons from different cavities, only energetically nearby polaritons can form coherences that survive the long‐range environmental fluctuation. Together with the Lindblad dynamics, this result implies that coherences delocalize through a one‐step mechanism where photons transfer from one cavity to another, shedding light to coherence evolution in natural and artificial quantum systems. This new optical platform based on molecular vibrational polariton thus demonstrates a way of combining photon and molecular modes to simulate coherence dynamics in the infrared regime.

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Section: Introductionmentioning

confidence: 99%

Ultrafast Coherence Delocalization in Real Space Simulated by Polaritons

Xiang

Yang

You

et al. 2022

Advanced Optical Materials

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“…The on-paper measured optical responses exhibited fluctuations as in the samples measured using microcentrifuge tubes. This implies that these fluctuations are not due to any interactions; rather, they are due to the spectrometer conversion process 40 .…”

Section: Resultsmentioning

confidence: 98%

Development of an Optical Assay to Detect SARS-CoV-2 Spike Protein Binding Interactions with ACE2 and Disruption of these Interactions Using Electric Current

Ahmad

Mustafa

Panicker³

et al. 2020

Preprint

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This study proposes a novel optical method of detecting and reducing SARS-CoV-2 transmission, the virus responsible for the COVID-19 pandemic that is sweeping the world today. SARS-CoV-2 belongs to the β-coronaviruses characterized by the crown-shaped spike protein that protrudes out of the virus particles, giving the virus a “corona” shape; hence the name coronavirus. This virus is similar to the viruses that caused SARS (severe acute respiratory syndrome) and MERS (Middle East respiratory syndrome), the other two coronavirus epidemics that were recently contained within the last ten years. The technique being proposed uses a light source from a smart phone and a mobile spectrophotometer to enable detection of viral proteins in solution or paper as well as protein-protein interactions. The proof-of-concept is shown by detecting soluble preparations of spike protein subunits from SARS-CoV-2, followed by detection of the actual binding potential of the spike protein with its host receptor, the angiotensin-converting enzyme 2 (ACE2). The results are validated by showing that this method can detect antigen-antibody binding using two independent viral protein-antibody pairs. The binding could be detected optically both in solution and on a solid support such as nitrocellulose membrane. Finally, this technique is combined with DC bias to show that introduction of a current into the system can be used to disrupt the antigen-antibody reaction, suggesting that the proposed extended technique can be a potential means of not only detecting the virus, but also reducing virus transmission by disrupting virus-receptor interactions electrically.SignificanceThe measured intensity of light can reveal information about different cellular parameters under study. When light passes through a bio-composition, the intensity is associated with its content. The nuclei size, cell shape and the refractive index variation of cells contributes to light intensity. In this work, an optical label-free real time detection method incorporating the smartphone light source and a portable mini spectrometer for SARS-CoV-2 detection was developed based on the ability of its spike protein to interact with the ACE2 receptor. The light interactions with control and viral protein solutions were capable of providing a quick decision regarding whether the sample under test was positive or negative, thus enabling SARS-CoV-2 detection in a rapid manner.

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“…2 Rather than by saturating the number of photons in either beam [19], then, we allow the maximization of p f (t) via quantum correlations [49], the potential of which we want to scrutinize here. At an extremum of J[|Φ〉], its functional derivative, (22,23), must vanish,…”

Section: Fluctuation-constrained Optimizationmentioning

confidence: 99%

“…In recent years, the possible use of quantum light sources for quantum-enhanced applications in microscopy or spectroscopy has gathered a lot of attention [18][19][20][21][22][23]. Of particular interest is the use of entangled photon pairs for applications which involve two-photon transitions.…”

Section: Introductionmentioning

confidence: 99%

How to optimize the absorption of two entangled photons

2021

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We investigate how entanglement can enhance two-photon absorption in a three-level system. First, we employ the Schmidt decomposition to determine the entanglement properties of the optimal two-photon state to drive such a transition, and the maximum enhancement which can be achieved in comparison to the optimal classical pulse. We then adapt the optimization problem to realistic experimental constraints, where photon pairs from a down-conversion source are manipulated by local operations such as spatial light modulators. We derive optimal pulse shaping functions to enhance the absorption efficiency, and compare the maximal enhancement achievable by entanglement to the yield of optimally shaped, separable pulses.

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Entangled light–matter interactions and spectroscopy

Abstract: Entangled photons exhibit non-classical light–matter interactions that create new opportunities in materials and molecular science.

Cited by 45 publications

References 132 publications

Ultrafast Coherence Delocalization in Real Space Simulated by Polaritons

Ultrafast Coherence Delocalization in Real Space Simulated by Polaritons

Development of an Optical Assay to Detect SARS-CoV-2 Spike Protein Binding Interactions with ACE2 and Disruption of these Interactions Using Electric Current

How to optimize the absorption of two entangled photons

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