Ultrafast all-optical switching of germanium-based flexible metaphotonic devices

Ultrafast all-optical switching of germanium-based flexible metaphotonic devices

Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based...

Full description

Saved in:
Bibliographic Details
Main Authors: Lim, Wen Xiang, Manjappa, Manukumara, Srivastava, Yogesh Kumar, Cong, Longqing, Kumar, Abhishek, MacDonald, Kevin F., Singh, Ranjan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2019
Subjects:
Ultrafast Photoswitching,
Flexible Metamaterial Device
DRNTU::Science::Physics
Online Access:https://hdl.handle.net/10356/88839
http://hdl.handle.net/10220/48335
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
Description
Summary:Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based flexible metaphotonic device for ultrafast optical switching of terahertz radiation is experimentally demonstrated. A resonant transmission modulation depth of 90% is achieved, with an ultrafast full recovery time of 17 ps. An observed sub‐picosecond decay constant of 670 fs is attributed to the presence of trap‐assisted recombination sites in the thermally evaporated germanium film.

Similar Items