BROWSE

Related Researcher

Author's Photo

Kim, Dai-Sik
Research Interests

ITEM VIEW & DOWNLOAD

Enhanced Surface Carrier Response by Field Overlapping in Metal Nanopatterned Semiconductor

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Enhanced Surface Carrier Response by Field Overlapping in Metal Nanopatterned Semiconductor
Author
Choi, GeunchangKang, TaeheeSeo, MinahKim, Dai-SikBahk, Young-Mi
Issue Date
2018-12
Publisher
AMER CHEMICAL SOC
Citation
ACS PHOTONICS, v.5, no.12, pp.4739 - 4744
Abstract
We demonstrate photoexcited carrier response of metallic nanogap-patterned semiconductor using optical pump-terahertz probe spectroscopy. Metallic nanogap facilitates observing surface carrier dynamics of bulk semiconductors by means of strong field confinement and enhancement of electromagnetic waves at nanoscale. Here, we observe that the enhanced terahertz transmission change of photoexcited InP has a nonmonotonic behavior (increases and then decreases) as reducing the gap size, which originates from different field confinement of near-infrared light (pump) and terahertz waves (probe). This 5 observation is theoretically reproduced by our simple model which informs that one can obtain the maximum pump probe signal at the condition in which the field overlapping of two different electromagnetic waves used in the pump probe experiment becomes maximized. Our results pave the way toward designing nanogap-based optical devices operated by multiwavelength electromagnetic waves.
URI
https://scholarworks.unist.ac.kr/handle/201301/26345
URL
https://pubs.acs.org/doi/10.1021/acsphotonics.8b00724
DOI
10.1021/acsphotonics.8b00724
ISSN
2330-4022
Appears in Collections:
PHY_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU