SiC transmission-type polarization rotator using a large magneto-optical effect boosted and stabilized by dressed photons.

Abstract:

:This paper reports the fabrication and operation of a transmission-type polarization rotator for visible light with a wavelength of 450 nm using indirect-transition-type semiconductor crystalline SiC in which Al atoms were implanted as a p-type dopant. A novel dressed-photon-phonon (DPP)-assisted annealing method was used for fabrication. The fabricated device exhibited a gigantic magneto-optical effect induced by interactions between photons, electrons, phonons, and magnetic fields in a nanometric space, mediated by dressed photons. The optical path length for polarization rotation was as short as the thickness of the p-n junction. It operated with a weak magnetic field on the order of mT, generated by injecting current to a ring-shaped electrode on the device surface. The Verdet constant was as large as 9.51 × 104 rad/T.m at a wavelength of 450 nm. SQUID measurements confirmed that the SiC crystal exhibited conspicuous ferromagnetic characteristics as a result of the DPP-assisted annealing. In this device, the dressed photons boosted the magnitude of the magneto-optical effect and stabilized the device operation of the polarization rotator.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Kadowaki T,Kawazoe T,Ohtsu M

doi

10.1038/s41598-020-69971-3

subject

Has Abstract

pub_date

2020-07-31 00:00:00

pages

12967

issue

1

issn

2045-2322

pii

10.1038/s41598-020-69971-3

journal_volume

10

pub_type

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