Graphene bolometer with thermoelectric readout and capacitive coupling to an antenna
Artikel i vetenskaplig tidskrift, 2018

We report on a prototype graphene radiation detector based on the thermoelectric effect. We used a split top gate to create a p-n junction in the graphene, thereby making an effective thermocouple to read out the electronic temperature in the graphene. The electronic temperature is increased due to the AC currents induced in the graphene from the incoming radiation, which is first received by an antenna and then directed to the graphene via the top-gate capacitance. With the exception of the constant DC voltages applied to the gate, the detector does not need any bias and is therefore very simple to use. The measurements showed a clear response to microwaves at 94 GHz with the signal being almost temperature independent in the 4-100 K temperature range. The optical responsivity reached ∼700 V/W.

Författare

Grigory Skoblin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Jie Sun

Beijing University of Technology

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Avgust Yurgens

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 112 6 063501

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

DOI

10.1063/1.5009629

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Senast uppdaterat

2018-04-10