Near unity narrowband infrared thermal emitters on silicon with silicon carbide-germanium metasurfaces

Rufangura, P; Cui, Y; Liu, H; Carlstrom, JD; Crozier, K; Brongersma, ML; Yang, Y; Iacopi, F

Near unity narrowband infrared thermal emitters on silicon with silicon carbide-germanium metasurfaces

Rufangura, P

Cui, Y Liu, H Carlstrom, JD Crozier, K Brongersma, ML Yang, Y

Iacopi, F

Permalink

Publisher:: AIP Publishing
Publication Type:: Journal Article
Citation:: APL Photonics, 2025, 10, (8), pp. 080802
Issue Date:: 2025-08-01

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download Published versionAdobe PDF (8.64 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Rufangura, P https://orcid.org/0000-0003-3093-1618
dc.contributor.author	Cui, Y
dc.contributor.author	Liu, H
dc.contributor.author	Carlstrom, JD
dc.contributor.author	Crozier, K
dc.contributor.author	Brongersma, ML
dc.contributor.author	Yang, Y https://orcid.org/0000-0001-7439-2156
dc.contributor.author	Iacopi, F https://orcid.org/0000-0002-3196-0990
dc.date.accessioned	2025-08-30T14:34:50Z
dc.date.available	2025-08-30T14:34:50Z
dc.date.issued	2025-08-01
dc.identifier.citation	APL Photonics, 2025, 10, (8), pp. 080802
dc.identifier.issn	2378-0967
dc.identifier.issn	2378-0967
dc.identifier.uri	http://hdl.handle.net/10453/189530
dc.description.abstract	Traditional thermal emitters are characterized by an incoherent broadband emission spectrum. However, narrowband coherent thermal emission with a high-quality factor in thermally stable materials is highly desirable for applications such as sensing, thermal energy management, thermophotovoltaic systems, and other infrared technologies. Recent advances in engineered nanostructured polaritonic materials, particularly polar dielectric materials in the mid-infrared (MIR) regime, have enabled new approaches to tailoring narrowband coherent thermal emission. The use of low-loss phonon polaritons in thermally stable silicon carbide provides a promising route to MIR thermal emission. In this work, we demonstrate narrowband, near-unity MIR thermal emission by coupling coherent surface phonon polaritons in a SiC layer with a subwavelength germanium grating on a silicon substrate. The demonstrated polarization-dependent thermal emitter, compatible with silicon fabrication technologies for seamless on-chip photonic integration, exhibits narrowband high emissivity (>90%) at a wavelength of ∼11 μm. Furthermore, we show that these emitters achieve experimental quality factors well above 100 while maintaining significant emission across a wide range of incident angles for MIR radiation.
dc.language	en
dc.publisher	AIP Publishing
dc.relation	http://purl.org/au-research/grants/arc/CE200100010
dc.relation.ispartof	APL Photonics
dc.relation.isbasedon	10.1063/5.0271574
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0205 Optical Physics
dc.subject.classification	5102 Atomic, molecular and optical physics
dc.title	Near unity narrowband infrared thermal emitters on silicon with silicon carbide-germanium metasurfaces
dc.type	Journal Article
utslib.citation.volume	10
utslib.for	0205 Optical Physics
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)/Centre for Clean Energy Technology (CCET) Associate Members
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-08-30T14:34:48Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	8

Abstract:

Traditional thermal emitters are characterized by an incoherent broadband emission spectrum. However, narrowband coherent thermal emission with a high-quality factor in thermally stable materials is highly desirable for applications such as sensing, thermal energy management, thermophotovoltaic systems, and other infrared technologies. Recent advances in engineered nanostructured polaritonic materials, particularly polar dielectric materials in the mid-infrared (MIR) regime, have enabled new approaches to tailoring narrowband coherent thermal emission. The use of low-loss phonon polaritons in thermally stable silicon carbide provides a promising route to MIR thermal emission. In this work, we demonstrate narrowband, near-unity MIR thermal emission by coupling coherent surface phonon polaritons in a SiC layer with a subwavelength germanium grating on a silicon substrate. The demonstrated polarization-dependent thermal emitter, compatible with silicon fabrication technologies for seamless on-chip photonic integration, exhibits narrowband high emissivity (>90%) at a wavelength of ∼11 μm. Furthermore, we show that these emitters achieve experimental quality factors well above 100 while maintaining significant emission across a wide range of incident angles for MIR radiation.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/189530