Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Polarization-Driven Ultrafast Optical Switching in TiS3 Nanoribbons via Anisotropic Hot Carrier Dynamics

Authors
Suk, Sang HoNah, SangheeSajjad, MuhammadSeo, Sung BokSong, JiachengSingh, NirpendraSim, Sangwan
Issue Date
Aug-2023
Publisher
John Wiley and Sons Inc.
Keywords
anisotropic polarization dependence; quasi-1D materials; titanium trisulfide; transient absorption microscopy; ultrafast optical modulation
Citation
Advanced Optical Materials, v.11, no.15, pp 1 - 11
Pages
11
Indexed
SCIE
SCOPUS
Journal Title
Advanced Optical Materials
Volume
11
Number
15
Start Page
1
End Page
11
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/113304
DOI
10.1002/adom.202300370
ISSN
2195-1071
2195-1071
Abstract
Layered quasi-1D nanomaterials exhibit strong linear dichroism and effective light-matter interactions, promising for novel information devices driven by light-polarization. In particular, their optical anisotropy and ultrafast photoresponse allow for polarization-controlled nanophotonic switches and modulators. However, the technology still requires substantial further studies due to an insufficient understanding of modulation mechanisms and limited investigations of a few materials. Here, transient absorption (TA) microscopy is employed to investigate the ultrafast polarization-based optical switching in TiS3 nanoribbons, a rising quasi-1D material of the transition metal trichalcogenide family. Highly anisotropic sub-picosecond near-infrared modulation is observed, which is most pronounced when the polarization of the probe pulse is aligned with the nanoribbon axis but disappears as the polarization is rotated to the perpendicular orientation. The authors attribute this significant dependence on the probe polarization to the hot carrier-induced broadening of an anisotropic interband resonance, as supported by analyses of transient TA line shapes and first principles calculated optical transitions. Furthermore, a strong pump polarization-dependent modulation is obtained by tuning the pumping energy, enabling highly anisotropic all-optical switching controlled solely by polarization. These results offer comprehensive information on both probe- and pump-polarization-based modulations and a deeper physical understanding of polarization-dependent photoresponse through ultrafast hot carrier dynamics.
Files in This Item
Go to Link
Appears in
Collections
COLLEGE OF ENGINEERING SCIENCES > SCHOOL OF ELECTRICAL ENGINEERING > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Sim, Sang wan photo

Sim, Sang wan
ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)
Read more

Altmetrics

Total Views & Downloads

BROWSE