Light-activated gigahertz ferroelectric domain dynamics (Conference Presentation)

Venkatraman Gopalan; Hirofumi Akamatsu; Yakun Yuan; Vladimir Stoica; Gregory Stone; Tiannan Yang; Zijian Hong; Shiming Lei; Yi Zhu; John Freeland; Long-Qing Chen; Haidan Wen

doi:10.1117/12.2322964

17 September 2018 Light-activated gigahertz ferroelectric domain dynamics (Conference Presentation)

Venkatraman Gopalan, Hirofumi Akamatsu, Yakun Yuan, Vladimir Stoica, Gregory Stone, Tiannan Yang, Zijian Hong, Shiming Lei, Yi Zhu, John Freeland, Long-Qing Chen, Haidan Wen

Author Affiliations +

Proceedings Volume 10753, Ultrafast Nonlinear Imaging and Spectroscopy VI; 107530A (2018) https://doi.org/10.1117/12.2322964
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

Using time- and spatially-resolved hard X-ray diffraction microscopy, the striking structural and electrical dynamics upon optical excitation of a single crystal of BaTiO3 are simultaneously captured on sub-nanoseconds and nanoscale within individual ferroelectric domains and across walls. A large emergent photo-induced electric field of up to 20 million volts per meter is discovered in a surface layer of the crystal, which then drives polarization and lattice dynamics that are dramatically dis- tinct in a surface layer versus bulk regions. A dynamical phase-field modeling (DPFM) method is developed that reveals the microscopic origin of these dynamics, leading to GHz polarization and elastic waves travelling in the crystal with sonic speeds and spatially varying frequencies. The ad- vance of spatiotemporal imaging and dynamical modeling tools open opportunities of disentangling ultrafast processes in complex mesoscale structures such as ferroelectric domains

Conference Presentation

Citation Download Citation

Venkatraman Gopalan, Hirofumi Akamatsu, Yakun Yuan, Vladimir Stoica, Gregory Stone, Tiannan Yang, Zijian Hong, Shiming Lei, Yi Zhu, John Freeland, Long-Qing Chen, and Haidan Wen "Light-activated gigahertz ferroelectric domain dynamics (Conference Presentation)", Proc. SPIE 10753, Ultrafast Nonlinear Imaging and Spectroscopy VI, 107530A (17 September 2018); https://doi.org/10.1117/12.2322964

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available