Graphene quantum dot bolometer camera: practical approaches and preliminary results
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU150705" target="_blank" >RIV/00216305:26620/23:PU150705 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1109/IRMMW-THz57677.2023.10298959" target="_blank" >http://dx.doi.org/10.1109/IRMMW-THz57677.2023.10298959</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/IRMMW-THz57677.2023.10298959" target="_blank" >10.1109/IRMMW-THz57677.2023.10298959</a>
Alternative languages
Result language
angličtina
Original language name
Graphene quantum dot bolometer camera: practical approaches and preliminary results
Original language description
Graphene is an exciting candidate for the detection of high-frequency electromagnetic radiation. Here, we have studied the bolometric performance of epitaxial graphene quantum dots (Q.D.s) on the silicon carbide (SiC) substrate in the terahertz (THz) range. The graphene Q.D. having a diameter in the 200 nm range, exhibited an extremely high resistance variation with temperature up to 4.7 M Omega K-1, a crucial parameter for the hot electron bolometers. The graphene Q.D.s bolometers have been fabricated in different geometrical configurations, such as variations in electrode spacing (2.5 and 5.0 mu m) and parallelly connected arrays of 4 and 8 Q.D.s. It is demonstrated that the absorbed power can be improved by tuning the bolometer geometrical configuration and the active graphene area, and the electrical responsivity is still very high for an extensive range of absorbed power. Additionally, we report that the photo response of graphene Q.D. bolometer devices is meagerly affected by the presence of a magnetic field as high as 15 T. The results presented here open ways to continue to optimize and realize the chip-scale matrix of the graphene Q.D.s bolometers for THz imaging and magneto-optical spectroscopy applications.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20200 - Electrical engineering, Electronic engineering, Information engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
International Conference on Infrared Millimeter and Terahertz Waves
ISBN
979-8-3503-3660-3
ISSN
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e-ISSN
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Number of pages
2
Pages from-to
„“-„“
Publisher name
IEEE
Place of publication
NEW YORK
Event location
Montreal
Event date
Sep 17, 2023
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
001098999800110