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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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20200 - Electrical engineering, Electronic engineering, Information engineering

Result continuities

  • Project

  • 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

  • e-ISSN

  • 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