Ultrafast-nonlinear ultraviolet pulse modulation in an AlInGaN polariton waveguide operating up to room temperature

Abstract

Ultrafast nonlinear photonics enables a host of applications in advanced on-chip spectroscopy and information processing. These rely on a strong intensity dependent (nonlinear) refractive index capable of modulating optical pulses on sub-picosecond timescales and on length scales suitable for integrated photonics. Currently there is no platform that can provide this for the UV spectral range where broadband spectra generated by nonlinear modulation can pave the way to new on-chip ultrafast (bio-) chemical spectroscopy devices. We demonstrate the giant nonlinearity of UV hybrid light-matter states (exciton-polaritons) up to room temperature in an AlInGaN waveguide. We experimentally measure ultrafast nonlinear spectral broadening of UV pulses in a compact 100 μm long device and deduce a nonlinearity 1000 times that in common UV nonlinear materials and comparable to non-UV polariton devices. Our demonstration promises to underpin a new generation of integrated UV nonlinear light sources for advanced spectroscopy and measurement.

Polarization Simultons in CARS by Polaritons

“…The first observation of spontaneous Raman solitons in Raman scattering by the NH 3 is reported in [13]. Significant progress is achieved in developing waveguides (see, for example [14] [15] [16]). In [14] was demonstrated that the giant nonlinearity of UV hybrid light-matter states (exciton-polaritons) up to room temperature, would lead to a new generation of integrated UV nonlinear light sources for advanced spectroscopy and measurement.…”

“…Significant progress is achieved in developing waveguides (see, for example [14] [15] [16]). In [14] was demonstrated that the giant nonlinearity of UV hybrid light-matter states (exciton-polaritons) up to room temperature, would lead to a new generation of integrated UV nonlinear light sources for advanced spectroscopy and measurement. The theoretical study of the magneto-optical manipulation of surface polaritons (SP s ) in the negative index metamaterial-dielectric interface waveguide system leading toward the creation of optical logic gates is shown in [15].…”

Lasing in a ZnO waveguide: Clear evidence of polaritonic gain obtained by monitoring the continuous exciton screening

“…However, these materials are only suitable for low power or low temperature applications. Recently, other groups have reported promising results for future devices based on guided polaritons working at room temperature: polariton lasing and amplification in ZnO [13], long-range coherent polariton condensate flow in a halide perovskite waveguide [14], ultrafast polariton modulation with GaN quantum wells [15], and polariton lasing in GaN-based circular guides [16].…”

Fabrication of Nanostructured GaAs/AlGaAs Waveguide for Low-Density Polariton Condensation from a Bound State in the Continuum

“…Such limitation was overcome [15] by growing highly reflective mirrors with layers exceeding 40 pairs in both sides of a microcavity as well as using many stacks of QWs. In the last few years a new approach has enabled the achievement of polariton states in horizontal platforms [5,[21][22][23][24][25], making the fabrication easier and less time consuming. A similar waveguide configuration with multiple QWs was used to investigate the enhancement of dipolar polariton interactions [8,[26][27][28].…”