biostudies-literatureHeo SYNational Research Foundation of KoreaJapan Science and Technology Agencyeabb1906https://www.ebi.ac.uk/biostudies/studies/S-EPMC7473666biostudies-literatureUnknown6(36)Passive radiative cooling functions by reflecting the solar spectrum and emitting infrared waves in broadband or selectively. However, cooling enclosed spaces that trap heat by greenhouse effect remains a challenge. We present a Janus emitter (JET) consisting of an Ag-polydimethylsiloxane layer on micropatterned quartz substrate. The induced spoof surface plasmon polariton helps overcome inherent emissivity loss of the polymer and creates near-ideal selective and broadband emission on the separate sides. This design results in not only remarkable surface cooling when the JET is attached with either side facing outwards but also space cooling when used as an enclosure wall. Thus, the JET can passively mitigate the greenhouse effect in enclosures while offering surface cooling performance coScience advancesA Janus emitter for passive heat release from enclosures.PMC74736662017H1A2A1042138JPMJPR19I22020R1A2C20049832018R1A4A10256232018M3D1A1058997Kim DHLee BJKim MSSong YMSeok TJKim YJLee GJLee HHeo SYIshii SfalseA Janus emitter for passive heat release from enclosures.Passive radiative cooling functions by reflecting the solar spectrum and emitting infrared waves in broadband or selectively. However, cooling enclosed spaces that trap heat by greenhouse effect remains a challenge. We present a Janus emitter (JET) consisting of an Ag-polydimethylsiloxane layer on micropatterned quartz substrate. The induced spoof surface plasmon polariton helps overcome inherent emissivity loss of the polymer and creates near-ideal selective and broadband emission on the separate sides. This design results in not only remarkable surface cooling when the JET is attached with either side facing outwards but also space cooling when used as an enclosure wall. Thus, the JET can passively mitigate the greenhouse effect in enclosures while offering surface cooling performance co2020-01-01T00:00:00Z2020 Sep2025-06-01T00:14:04.915Z2025-06-01T00:14:04.915ZS-EPMC74736663291761010.1126/sciadv.abb1906