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Optica Publishing Group
  • The Thirteenth International Conference on Ultrafast Phenomena
  • 2002 OSA Technical Digest Series (Optica Publishing Group, 2002),
  • paper WB1
  • https://doi.org/10.1364/UP.2002.WB1

Coherent Control Over Collective Polariton Excitations: The Dawn of Polaritonics

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Abstract

Coherent optical control efforts to date have been aimed almost exclusively at manipulation of excitations that are localized in space. Control over coherently propagating modes offers several important new prospects. First, it opens up the use of spatial as well as temporal parameters as control elements in the design of optimized excitation waveforms. This enables new types of control in which interferences among coherent responses that originate from different regions of a sample may be used to selectively enhance or suppress the net response at a specified location and/or time. Coherent amplification of responses is possible through constructive interferences, allowing large coherent amplitudes to be achieved with modest excitation light intensities. Collective responses may be optically excited in one region of a heterogeneous sample and directed toward other regions including those at which the responses could not be driven directly by the excitation light due to selection rules, opacity, or other restrictions. In this manner the normally inaccessible regions may be studied or subjected to otherwise unattainable coherent control. In addition, propagating modes may possibly be used as coherent signals that can be launched at specified locations or ”addresses” and received, manipulated further, or read out at other specified addresses, all at ultrahigh bandwidths.

© 2002 Optical Society of America

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