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Related Experiment Video

Updated: Jun 2, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

All-photonic multifunctional molecular logic device.

Joakim Andréasson1, Uwe Pischel, Stephen D Straight

  • 1Department of Chemical and Biological Engineering, Physical Chemistry, Chalmers University of Technology, SE-412 96 Göteborg, Sweden. a-son@chalmers.se

Journal of the American Chemical Society
|May 14, 2011
PubMed
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Researchers developed a single molecule with three linked photochromes capable of performing multiple logic operations. This breakthrough enables multifunctional, reconfigurable nanoscale logic devices for molecular information processing.

Area of Science:

  • Molecular engineering
  • Supramolecular chemistry
  • Nanotechnology

Background:

  • Photochromes are photoswitchable molecules that can perform binary logic operations, similar to transistors.
  • Interactions like energy and electron transfer in multi-photochrome systems allow for the design of complex logic devices.
  • Selective control of photochromes using different wavelengths and readout via optical properties enables multifunctional molecular systems.

Purpose of the Study:

  • To design and demonstrate a single molecule capable of performing diverse logic operations.
  • To showcase the potential of light-responsive molecules as reconfigurable nanoscale logic devices.
  • To explore a new approach to molecular information processing units.

Main Methods:

  • Synthesis of a novel molecule comprising three linked photochromes.

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Last Updated: Jun 2, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

  • Utilizing selective photoisomerization with different wavelengths for input control.
  • Employing absorption and emission properties for logic output detection.
  • Configuring the molecule to perform various Boolean logic gates and complex logic devices.

    • Main Results:

    • A single molecule was successfully configured to operate as AND, XOR, INH, half-adder, half-subtractor, multiplexer, demultiplexer, encoder, decoder, keypad lock, and a reversible transfer gate.
    • All demonstrated logic devices shared a common initial state.
    • The system exhibited multifunctional and reconfigurable capabilities using all-photonic inputs and outputs.

    Conclusions:

    • Light-responsive molecules, specifically multi-photochrome systems, offer significant advantages for creating multifunctional and reconfigurable nanoscale logic devices.
    • This work represents a step towards true molecular information processing units.
    • The demonstrated molecular system highlights the potential for advanced optical computing and data storage at the molecular level.