Focusing surface phonon-polaritons for tunable thermal radiation
Abstract We demonstrate unprecedented control and enhancement of thermal radiation using subwavelength conical membranes of silicon nitride. Based on fluctuational electrodynamics, we find that the focusing of surface phonon-polaritons along these membranes enhances their far-field thermal conductan...
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| Format: | Article |
| Language: | English |
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Springer
2025-01-01
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| Series: | Discover Nano |
| Online Access: | https://doi.org/10.1186/s11671-025-04191-0 |
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| author | Jose Ordonez-Miranda Masahiro Nomura Sebastian Volz |
| author_facet | Jose Ordonez-Miranda Masahiro Nomura Sebastian Volz |
| author_sort | Jose Ordonez-Miranda |
| collection | DOAJ |
| description | Abstract We demonstrate unprecedented control and enhancement of thermal radiation using subwavelength conical membranes of silicon nitride. Based on fluctuational electrodynamics, we find that the focusing of surface phonon-polaritons along these membranes enhances their far-field thermal conductance by three orders of magnitude over the blackbody limit. Our calculations reveal a non-monotonic dependence of the thermal conductance on membrane geometry, with a characteristic radiation plateau emerging at small front widths due to competing effects of the polariton focusing and radiative area. The obtained results thus introduce the conical geometry as a powerful degree of freedom for tailoring thermal radiation, with potential implications for energy harvesting and thermal management at the nanoscale. |
| format | Article |
| id | doaj-art-4c2d027d0d6a44ca862a33d87fc2bff8 |
| institution | Kabale University |
| issn | 2731-9229 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Nano |
| spelling | doaj-art-4c2d027d0d6a44ca862a33d87fc2bff82025-01-26T12:48:48ZengSpringerDiscover Nano2731-92292025-01-012011910.1186/s11671-025-04191-0Focusing surface phonon-polaritons for tunable thermal radiationJose Ordonez-Miranda0Masahiro Nomura1Sebastian Volz2LIMMS, CNRS-IIS IRL 2820, The University of TokyoLIMMS, CNRS-IIS IRL 2820, The University of TokyoLIMMS, CNRS-IIS IRL 2820, The University of TokyoAbstract We demonstrate unprecedented control and enhancement of thermal radiation using subwavelength conical membranes of silicon nitride. Based on fluctuational electrodynamics, we find that the focusing of surface phonon-polaritons along these membranes enhances their far-field thermal conductance by three orders of magnitude over the blackbody limit. Our calculations reveal a non-monotonic dependence of the thermal conductance on membrane geometry, with a characteristic radiation plateau emerging at small front widths due to competing effects of the polariton focusing and radiative area. The obtained results thus introduce the conical geometry as a powerful degree of freedom for tailoring thermal radiation, with potential implications for energy harvesting and thermal management at the nanoscale.https://doi.org/10.1186/s11671-025-04191-0 |
| spellingShingle | Jose Ordonez-Miranda Masahiro Nomura Sebastian Volz Focusing surface phonon-polaritons for tunable thermal radiation Discover Nano |
| title | Focusing surface phonon-polaritons for tunable thermal radiation |
| title_full | Focusing surface phonon-polaritons for tunable thermal radiation |
| title_fullStr | Focusing surface phonon-polaritons for tunable thermal radiation |
| title_full_unstemmed | Focusing surface phonon-polaritons for tunable thermal radiation |
| title_short | Focusing surface phonon-polaritons for tunable thermal radiation |
| title_sort | focusing surface phonon polaritons for tunable thermal radiation |
| url | https://doi.org/10.1186/s11671-025-04191-0 |
| work_keys_str_mv | AT joseordonezmiranda focusingsurfacephononpolaritonsfortunablethermalradiation AT masahironomura focusingsurfacephononpolaritonsfortunablethermalradiation AT sebastianvolz focusingsurfacephononpolaritonsfortunablethermalradiation |