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Related Concept Videos

The Quantum-Mechanical Model of an Atom02:45

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
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What is Organic Chemistry?02:17

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Organic chemistry is the study of compounds of carbon called organic compounds. Organic compounds either originate from living organisms or are synthesized by chemists. A defining trait of these compounds is the presence of carbon as the principal element, which is bonded to other carbon atoms and other elements such as hydrogen, oxygen, nitrogen, and sulfur. The existence of a wide array of organic molecules is a consequence of carbon atoms’ ability to form up to four strong bonds to...
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IR Absorption Frequency: Hybridization01:21

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Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
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Related Experiment Video

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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Quantum interference in organic solid.

Aleksander Rebane, Niklas Christensson, Mikhail Drobizhev

    Optics Express
    |June 6, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Quantum interference was observed between one-photon and three-photon absorption in an organic polymer film at room temperature. This phenomenon, visible to the naked eye, arises from specific light frequencies interacting with dendrimer chromophores.

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    Area of Science:

    • Quantum optics
    • Materials science
    • Organic electronics

    Background:

    • Quantum interference is a fundamental phenomenon with applications in quantum computing and sensing.
    • Multi-photon absorption in organic materials is crucial for technologies like optical limiting and bio-imaging.
    • Controlling multi-photon processes with high contrast is challenging.

    Purpose of the Study:

    • To demonstrate high contrast quantum interference between one-photon and three-photon absorption pathways.
    • To investigate this interference in an organic solid at room temperature.
    • To explore the potential for visible observation of quantum phenomena.

    Main Methods:

    • Utilizing a thin polymer film doped with fluorescing dendrimer chromophores.
    • Employing simultaneous femtosecond laser pulses at a near-infrared frequency (ω) and its third harmonic (3ω).
    • Analyzing the resulting spatial interference fringe patterns.

    Main Results:

    • Achieved high contrast quantum interference between one-photon and three-photon absorption.
    • Observed a spatial interference fringe pattern.
    • The interference pattern was directly visible to the naked eye.

    Conclusions:

    • High contrast quantum interference between different photon absorption pathways is achievable in organic solids.
    • This phenomenon can occur at room temperature, simplifying experimental requirements.
    • The direct visual observation of interference opens possibilities for novel optical devices and demonstrations.