Since the discovery of monolayer ferromagnets, magneto-optics plays a compelling role in revealing new physics of magnetism in the extreme nanoscale limit. Here, I will first discuss our recent discovery of the ultra-sharp exciton emission in the van der Waals antiferromagnetic NiPS3 from bulk to atomically thin flakes. Magneto-optical measurements under in-plane field is used to reveal the strong coupling between the spin the electrical dipole oscillator, leading to the linear polarization of the exciton emission. We will further discuss the splitting of the spin-correlated emission in NiPS3 under in-plane magnetic field along various directions of the crystal, supporting the Zhang-Rice exciton origin of the emission. Benefiting from the spin-correlated emission in NiPS3, the Néel vector orientation can be optically detected as perpendicular to the exciton polarization, providing an easy, fast, nondestructive strategy to determine the Néel vector orientation. We further utilize the magneto-optic effect to reveal the three-state nematicity and domain evolution in NiPS3.
Single photon emitters in 2D and nanoscale materials provide an increasingly promising framework for scalable quantum networking and photonic quantum simulation, but control of the emitter photophysics remains an obstacle to the realization of useful photonic quantum technologies. Here, we use correlative cathodoluminescence, photoluminescence, and atomic force microscopies to probe the effect of nanoscale strain gradients on strain-localized excitons in GaSe. With this understanding in hand, we describe the potential for in situ electron-beam manipulation and optical characterization of emitter photophysics.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.