Antenna-coupled direct detector for millimetre and submillimetre astronomy based on 2D electron gas in semiconducting heterostructure

Morozov, Dmitry L., Mauskopf, Philip Daniel ORCID: https://orcid.org/0000-0001-6397-5516, Dunscombe, Christopher John and Henini, Mohamed 2008. Antenna-coupled direct detector for millimetre and submillimetre astronomy based on 2D electron gas in semiconducting heterostructure. Presented at: Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, Marseilles, France, 26-28 June 2008. Published in: Duncan, William D., Holland, Wayne S., Withington, Stafford and Zmuidzinas, Jonas eds. Millimeter and submillimeter detectors and instrumentation for astronomy IV: 26-28 June 2008, Marseille, France. Proceedings of the SPIE (7020) Bellingham, WA: SPIE, p. 702021. 10.1117/12.789753

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Abstract

The energy resolution of a detector is related to the figure of merit NEP×√τ which is proportional to the heatcapacity of the detector. Hot electron (cold electron) devices have much lower heat capacity than bolometers withsilicon nitride based thermal isolation. Traditional hot electron bolometers (HEB) require sub-micron fabricationfor use at submm wavelengths and it is difficult to simultaneously couple radiation and read out these devices.The 2D electron gas (2DEG) in a semiconductor heterojunction effectively acts as a metal film with a thicknessof a few angstroms and a tunable density and electron mobility. We describe a HEB that uses a 2DEG as anabsorber and present simulations of optical coupling schemes for this type of detector including an antennacoupled to a coplanar waveguide with distributed 2DEG absorbers.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	SPIE
ISBN:	9780819472304
ISSN:	0277786X
Last Modified:	20 Oct 2022 08:29
URI:	https://orca.cardiff.ac.uk/id/eprint/28530

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