Topic
Phase conjugation
About: Phase conjugation is a research topic. Over the lifetime, 3694 publications have been published within this topic receiving 49099 citations.
Papers published on a yearly basis
Papers
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TL;DR: Pairing two nonlinear metasurfaces formed by plasmonic nanoantennas loaded with χ(3) nonlinear elements put forward a realistic design for a time-reversal 'perfect lens', which can overcome the limitations in resolution and sensitivity to losses typical of negative-index lenses.
Abstract: We investigate the use of nonlinear metasurfaces formed by plasmonic nanoantennas loaded with χ(3) nonlinear elements, in order to realize subwavelength imaging based on phase conjugation and time reversal. The nanoantennas’ plasmonic resonance is used to boost the nonlinear response over an ultrathin surface, meeting the conditions for efficient phase conjugation necessary for imaging applications. Pairing two such surfaces, we put forward a realistic design for a time-reversal ‘perfect lens’, which can overcome the limitations in resolution and sensitivity to losses typical of negative-index lenses.
93 citations
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TL;DR: In this paper, the theory of degenerate four wave mixing in saturable absorbers is verified and imaging capabilities are demonstrated. And the phase conjugation is performed in a thin film by a cw laser.
93 citations
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26 Jan 2018TL;DR: An efficient surface time-reversal of the incident electric field in an ENZ material producing both phase-conjugated and negative refracted beams is provided.
Abstract: We provide an efficient surface time-reversal of the incident electric field in an ENZ material producing both phase-conjugated and negative refracted beams. The results obtained exploiting degenerate four-wave mixing show an efficiency conversion over 200%.
93 citations
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TL;DR: In this paper, a two-layer sample placed in an optical cavity made with two concave mirrors, spontaneous oscillation due to two-beam coupling gain was observed for an applied electric field of 75 volts per micrometer, marking a milestone for this growing class of optoelectronic materials.
Abstract: Optical processing with photorefractive polymers depends on achieving high optical gain, which depends exponentially on the product of the interaction length and the gain coefficient. By use of several polymer layers to increase the overall interaction length and a new high-performance photorefractive polymer composite, the overall optical one-pass gain becomes as large as a factor of 5. For a two-layer sample placed in an optical cavity made with two concave mirrors, spontaneous oscillation due to two-beam coupling gain was observed. Because only one pumping beam is required, this configuration also acts as a self-pumped phase-conjugating mirror with a reflectivity of 13 percent for an applied electric field of 75 volts per micrometer, marking a milestone for this growing class of optoelectronic materials.
92 citations
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TL;DR: In this paper, the optical phase conjugation at the midpoint of a 100-km standard single-mode fiber was used to compensate for the distortion of 10-Gb/s intensity-modulated NRZ pulse at an input power level exceeding +10 dBm with a resultant power penalty of less than 1.2 dB.
Abstract: Pulse shape distortion due to chromatic dispersion and self-phase modulation in a single-mode fiber was effectively compensated for by using an optical phase-conjugate wave generated by nondegenerate forward four-wave mixing in a zero-dispersion single-mode fiber. Using optical phase conjugation at the midpoint of a 100-km standard single-mode fiber compensates for the distortion of 10-Gb/s intensity-modulated NRZ pulse at an input power level exceeding +10 dBm with a resultant power penalty of less than 1.2 dB. >
91 citations