Light-powered molecular logic goes nonlinear

Scholes, Gregory D.

doi:10.1073/pnas.1316494110

Proc. Natl. Acad. Sci. U.S.A.

2013

DOI: 10.1073/pnas.1316494110

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Light-powered molecular logic goes nonlinear

Gregory D. Scholes

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2015

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Cited by 2 publications

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“…Here, we demonstrate a two-dimension photon-echo (2D-PE) setup that allows evaluation of a multivariable logic function in parallel for all inputs and that delivers a macroscopic readout. This experimental realization is grounded in the scheme for parallel molecular processing by coherent 2D spectroscopy proposed in refs and . The proposed optically addressed molecular device computes in parallel both binary and multivalued logic functions, taking advantage of the complex dynamics induced by the interaction of the molecular states with three successive optical pulses.…”

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confidence: 99%

Parallel and Multivalued Logic by the Two-Dimensional Photon-Echo Response of a Rhodamine–DNA Complex

Fresch

Cipolloni

Yan

et al. 2015

J. Phys. Chem. Lett.

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Implementing parallel and multivalued logic operations at the molecular scale has the potential to improve the miniaturization and efficiency of a new generation of nanoscale computing devices. Two-dimensional photon-echo spectroscopy is capable of resolving dynamical pathways on electronic and vibrational molecular states. We experimentally demonstrate the implementation of molecular decision trees, logic operations where all possible values of inputs are processed in parallel and the outputs are read simultaneously, by probing the laser-induced dynamics of populations and coherences in a rhodamine dye mounted on a short DNA duplex. The inputs are provided by the bilinear interactions between the molecule and the laser pulses, and the output values are read from the two-dimensional molecular response at specific frequencies. Our results highlights how ultrafast dynamics between multiple molecular states induced by light–matter interactions can be used as an advantage for performing complex logic operations in parallel, operations that are faster than electrical switching.

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mentioning

confidence: 99%

Parallel and Multivalued Logic by the Two-Dimensional Photon-Echo Response of a Rhodamine–DNA Complex

Fresch

Cipolloni

Yan

et al. 2015

J. Phys. Chem. Lett.

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Information processing in parallel through directionally resolved molecular polarization components in coherent multidimensional spectroscopy

Yan

Fresch

Levine

et al. 2015

The Journal of Chemical Physics

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We propose that information processing can be implemented by measuring the directional components of the macroscopic polarization of an ensemble of molecules subject to a sequence of laser pulses. We describe the logic operation theoretically and demonstrate it by simulations. The measurement of integrated stimulated emission in different phase matching spatial directions provides a logic decomposition of a function that is the discrete analog of an integral transform. The logic operation is reversible and all the possible outputs are computed in parallel for all sets of possible multivalued inputs. The number of logic variables of the function is the number of laser pulses used in sequence. The logic function that is computed depends on the chosen chromophoric molecular complex and on its interactions with the solvent and on the two time intervals between the three pulses and the pulse strengths and polarizations. The outputs are the homodyne detected values of the polarization components that are measured in the allowed phase matching macroscopic directions, kl, kl=∑iliki where ki is the propagation direction of the ith pulse and {li} is a set of integers that encodes the multivalued inputs. Parallelism is inherently implemented because all the partial polarizations that define the outputs are processed simultaneously. The outputs, which are read directly on the macroscopic level, can be multivalued because the high dynamical range of partial polarization measurements by nonlinear coherent spectroscopy allows for fine binning of the signals. The outputs are uniquely related to the inputs so that the logic is reversible.

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Light-powered molecular logic goes nonlinear

Cited by 2 publications

References 26 publications

Parallel and Multivalued Logic by the Two-Dimensional Photon-Echo Response of a Rhodamine–DNA Complex

Parallel and Multivalued Logic by the Two-Dimensional Photon-Echo Response of a Rhodamine–DNA Complex

Information processing in parallel through directionally resolved molecular polarization components in coherent multidimensional spectroscopy

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