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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Nonlinear effects in multi-photon polaritonics.

A A Pervishko1, T C H Liew, V M Kovalev

  • 1Division of Physics and Applied Physics, Nanyang Technological University, Singapore. anas0005@e.ntu.edu.sg

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|July 12, 2013
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Summary

Nonlinear effects in semiconductor quantum wells within photonic microcavities were studied. Two-photon absorption leads to optical bistability under coherent pumping, impacting light-matter interactions.

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Area of Science:

  • Solid-state physics
  • Quantum optics
  • Materials science

Background:

  • Semiconductor quantum wells are crucial for optoelectronic devices.
  • Photonic microcavities enhance light-matter interactions.
  • Nonlinear optical effects are key for advanced photonic applications.

Purpose of the Study:

  • To theoretically investigate nonlinear optical effects in a semiconductor quantum well inside a photonic microcavity.
  • To analyze two-photon absorption by a 2p exciton state.
  • To explore the emergence of bistability due to nonlinear absorption.

Main Methods:

  • Theoretical modeling of nonlinear effects.
  • Calculation of the two-photon absorption matrix element.
  • Computation of the sample's emission spectrum.

Main Results:

  • The matrix element for two-photon absorption by a 2p exciton was calculated.
  • The emission spectrum was computed.
  • Optical bistability was demonstrated under coherent pumping, arising from nonlinear two-photon absorption.

Conclusions:

  • Nonlinear two-photon absorption in semiconductor quantum wells within photonic microcavities can induce optical bistability.
  • This finding has implications for the design of optical switches and memory devices.
  • Coherent pumping is a key factor in observing this nonlinear phenomenon.