Stimulated Polariton Scattering Research Articles

Control of forward stimulated polariton scattering in periodically-poled KTP crystals

We report suppression of forward stimulated polariton scattering (SPS) in χ((2)) structured media. Periodic poling in KTiOPO(4) (KTP) leads to the destructive interference of phonon-polariton waves, which is responsible for the dependence of the SPS threshold on the poling period. This was confirmed by comparing the SPS thresholds in periodically-poled KTP (PPKTP) crystals with different poling periods. Further confirming the physical picture, we studied the changes in the Stokes power distribution as a function of the rotation angle of the PPKTP crystal.

Frequency-Tunable THz Source Based on Stimulated Polariton Scattering in ${\rm Mg{:}LiNbO}_{3}$

We report a very compact, laser diode end-pumped THz laser source, which utilizes two resonators to generate frequency-tunable radiation across the range 1.53-2.82 THz via stimulated polariton scattering (SPS) in a Mg:LiNbO3 crystal. To the best of our knowledge, this THz system operates with the lowest pump power threshold (2.4 W), and highest conversion efficiency (6.45tW average output power at 1.82 THz for 5 W input diode pump power) ever reported for a THz source based on SPS.

Erratum: Kinetics of Stimulated Polariton Scattering in Planar Microcavities: Evidence for a Dynamically Self-Organized Optical Parametric Oscillator [Phys. Rev. Lett.101, 136401 (2008)

Received 24 September 2008DOI:https://doi.org/10.1103/PhysRevLett.101.179901©2008 American Physical Society

Kinetics of Stimulated Polariton Scattering in Planar Microcavities: Evidence for a Dynamically Self-Organized Optical Parametric Oscillator

Strong temporal hysteresis effects in the population kinetics of pumped and scattered lower polaritons (LPs) have been observed in a planar semiconductor microcavity under a nanosecond-long pulsed resonant excitation (by frequency and angle) near the inflection point of the LPs' dispersion. The hysteresis loops have a complicated shape due to the interplay of two instabilities. The self-instability (bistability) of the nonlinear pumped LP is accompanied by a strong parametric instability which causes an explosive growth of the scattered LPs' population over a wide range of wave vectors. Finally, after a 30-500 ps period, a three-mode scattering pattern forms, thereby demonstrating a dynamically self-organized regime of the optical parametric oscillator. Stability is maintained by the presence of numerous weak "above-condensate" modes; the whole system therefore appears to be highly correlated.

Long Wave Short Wave Interaction Induced by Stimulated Polariton Scattering

The parametric down conversion of the light wave induced by stimulated polariton scattering in polar crystals is investigated from the aspect of long wave short wave interaction. Assuming that the ...

Stimulated Polariton Scattering in Semiconductor Microcavities: New Physics and Potential Applications

Stimulated polariton scattering in semiconductor microcavities is reported. The phenomena arise from the bosonic character of the coupled exciton-photon modes of the system. The ability to manipulate and control the polariton dispersions in microcavities is shown to be a key factor underlying the new observations. The potential of such phenomena to form the basis of a new type of coherent light source (polariton lasers) and highly efficient optical parametric oscillators is discussed.