Black Silicon Revisited as an Ultrabroadband Perfect Infrared Absorber over 20 μm Wavelength Range by Sreyash Sarkar, Ahmed A. Elsayed, Yasser M. Sabry, Frédéric Marty, Jérémie Drévillon, Xiaoyi Liu, Zhongzhu Liang, Elodie Richalot, Philippe Basset, Elyes Nefzaoui, Tarik Bourouina

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