Ultrafast-nonlinear ultraviolet pulse modulation in an AlInGaN polariton waveguide operating up to room temperature
Artikel i vetenskaplig tidskrift, 2021

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.

Författare

D. M. Di Paola

University of Sheffield

P. M. Walker

University of Sheffield

R. P.A. Emmanuele

University of Sheffield

A. V. Yulin

ITMO University

Joachim Ciers

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Ecole Polytechnique Federale de Lausanne (EPFL)

Z. Zaidi

University of Sheffield

J. F. Carlin

Ecole Polytechnique Federale de Lausanne (EPFL)

Nicolas Grandjean

Ecole Polytechnique Federale de Lausanne (EPFL)

I. A. Shelykh

ITMO University

Háskóli Íslands

M. S. Skolnick

University of Sheffield

ITMO University

R. Butté

Ecole Polytechnique Federale de Lausanne (EPFL)

D. N. Krizhanovskii

ITMO University

University of Sheffield

Nature Communications

2041-1723 (ISSN)

Vol. 12 1 3504

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1038/s41467-021-23635-6

PubMed

34108471

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Senast uppdaterat

2021-06-23