Optical Modulation of BST/STO Thin Films in the Terahertz Range

Optical Modulation of BST/STO Thin Films in the Terahertz Range The $$ {\hbox{Ba}}_{0.7} {\hbox{Sr}}_{0.3} {\hbox{TiO}}_{3} $$ Ba 0.7 Sr 0.3 TiO 3 (BST) thin film (30.3 nm) deposited on a $$ {\hbox{SrTiO}}_{3} $$ SrTiO 3 (STO) film/silicon substrate sample was modulated by 532 nm continuous-wave laser in the range of 0.2–1 THz at room temperature. The refractive index variation was observed to linearly increase at the highest 3.48 for 0.5 THz with the pump power increasing to 400 mW. It was also found that the BST/STO sample had a larger refractive index variation and was more sensitive to the external optical field than a BST monolayer due to the epitaxial strain induced by the STO film. The electric displacement–electric field loops results revealed that the increasing spontaneous polarization with the STO film that was induced was responsible for the larger refractive index variation of the BST/STO sample. In addition, the real and imaginary part of the permittivity were observed increasing along with the external field increasing, due to the soft mode hardening. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Electronic Materials Springer Journals

Optical Modulation of BST/STO Thin Films in the Terahertz Range

Loading next page...
 
/lp/springer_journal/optical-modulation-of-bst-sto-thin-films-in-the-terahertz-range-Ct9b7P0lOI
Publisher
Springer Journals
Copyright
Copyright © 2018 by The Minerals, Metals & Materials Society
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics
ISSN
0361-5235
eISSN
1543-186X
D.O.I.
10.1007/s11664-018-6259-9
Publisher site
See Article on Publisher Site

Abstract

The $$ {\hbox{Ba}}_{0.7} {\hbox{Sr}}_{0.3} {\hbox{TiO}}_{3} $$ Ba 0.7 Sr 0.3 TiO 3 (BST) thin film (30.3 nm) deposited on a $$ {\hbox{SrTiO}}_{3} $$ SrTiO 3 (STO) film/silicon substrate sample was modulated by 532 nm continuous-wave laser in the range of 0.2–1 THz at room temperature. The refractive index variation was observed to linearly increase at the highest 3.48 for 0.5 THz with the pump power increasing to 400 mW. It was also found that the BST/STO sample had a larger refractive index variation and was more sensitive to the external optical field than a BST monolayer due to the epitaxial strain induced by the STO film. The electric displacement–electric field loops results revealed that the increasing spontaneous polarization with the STO film that was induced was responsible for the larger refractive index variation of the BST/STO sample. In addition, the real and imaginary part of the permittivity were observed increasing along with the external field increasing, due to the soft mode hardening.

Journal

Journal of Electronic MaterialsSpringer Journals

Published: Apr 2, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off