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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.05039 |
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| _version_ | 1866910042323681280 |
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| author | Nwosu, Ikechukwu D Matasović, Lujo Ramos, Tárcius N Phuoc, Nguyen Le Londi, Giacomo Gillett, Alexander J Toolan, Daniel T W Smith, Charles T Whitehead, George F S Blanchard-Desce, Mireille Daniel, Jonathan Linnolahti, Mikko Olivier, Yoann Romanov, Alexander S |
| author_facet | Nwosu, Ikechukwu D Matasović, Lujo Ramos, Tárcius N Phuoc, Nguyen Le Londi, Giacomo Gillett, Alexander J Toolan, Daniel T W Smith, Charles T Whitehead, George F S Blanchard-Desce, Mireille Daniel, Jonathan Linnolahti, Mikko Olivier, Yoann Romanov, Alexander S |
| contents | Advanced photonic materials showing two-photon absorption (2PA) have been widely explored to develop three-dimensional imaging, micro and nanofabrication, all-optical switching, lithography on a nanoscale and many other enabling technologies. These all require nonlinear absorption chromophores with intrinsic 2PA cross-sections and long-term photo-and thermal stability. Here, we disclose the very first example of the dipolar carbenemetal-amide (CMA) material showing a enhanced 2PA cross-section up to 105 GM. Overall molecular design considerations such as extended $π$-conjugation (to increase polarizability), minimizing the singlet-triplet energy gap ($Δ$E ST ), and using heavy metal atoms are the first design principles to obtain bright one-and two-photon excited thermally activated delayed fluorescence (TADF) material, showing one of the highest radiative rate of 2.18$\bullet$10 6 s -1 across CMA materials. Bright red CMA 2P-TADF material shows excellent photostability (LT 50 = 3 h) to 20 mW femtosecond pulsed laser excitation at 1000 nm, encouraging further CMA exploration for future applications in advanced photonic technologies requiring third-order nonlinear optical properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_05039 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Enhanced Third-Order Optical Nonlinearity in a Dipolar Carbene-Metal-Amide Material with Two-Photon Excited Delayed Fluorescence Nwosu, Ikechukwu D Matasović, Lujo Ramos, Tárcius N Phuoc, Nguyen Le Londi, Giacomo Gillett, Alexander J Toolan, Daniel T W Smith, Charles T Whitehead, George F S Blanchard-Desce, Mireille Daniel, Jonathan Linnolahti, Mikko Olivier, Yoann Romanov, Alexander S Chemical Physics Advanced photonic materials showing two-photon absorption (2PA) have been widely explored to develop three-dimensional imaging, micro and nanofabrication, all-optical switching, lithography on a nanoscale and many other enabling technologies. These all require nonlinear absorption chromophores with intrinsic 2PA cross-sections and long-term photo-and thermal stability. Here, we disclose the very first example of the dipolar carbenemetal-amide (CMA) material showing a enhanced 2PA cross-section up to 105 GM. Overall molecular design considerations such as extended $π$-conjugation (to increase polarizability), minimizing the singlet-triplet energy gap ($Δ$E ST ), and using heavy metal atoms are the first design principles to obtain bright one-and two-photon excited thermally activated delayed fluorescence (TADF) material, showing one of the highest radiative rate of 2.18$\bullet$10 6 s -1 across CMA materials. Bright red CMA 2P-TADF material shows excellent photostability (LT 50 = 3 h) to 20 mW femtosecond pulsed laser excitation at 1000 nm, encouraging further CMA exploration for future applications in advanced photonic technologies requiring third-order nonlinear optical properties. |
| title | Enhanced Third-Order Optical Nonlinearity in a Dipolar Carbene-Metal-Amide Material with Two-Photon Excited Delayed Fluorescence |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2603.05039 |