Optoelectronic properties of black silicon fabricated by femtosecond laser in ambient air: exploring a large parameter space

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Abstract

We study the surface morphology, optical absorption (400–1100 nm), and carrier lifetime of black silicon fabricated by femtosecond (fs) laser in air. We explore a large laser parameter space, for which we adopt a single parameter ξ to describe the cumulative fluence delivered to the sample. We also study the laser-oxidized surface layer by measuring its photoluminescence spectra and comparing its effect on the aforementioned properties. Our study in a broad range of ξ is instructive in choosing laser parameters when targeting different applications.

Original languageEnglish
Pages (from-to)1224 - 1227
Number of pages4
JournalOptics Letters
Volume48
Issue number5
DOIs
Publication statusPublished - 1 Mar 2023
MoE publication typeB1 Article in a scientific magazine

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  • PREIN/Savin 2

    Savin, H., Liu, X. & Radfar, B.

    01/09/202231/12/2026

    Project: Academy of Finland: Other research funding

  • NIR

    Vähänissi, V., Savin, H., Ayedh, H., Setälä, O., Radfar, B. & Liu, H.

    01/09/202031/08/2024

    Project: Academy of Finland: Other research funding

  • NanoWires (EMPIR)

    Savin, H., Chen, K. & Pasanen, T.

    01/09/202031/08/2023

    Project: EU other competitive funding (ERA-NET, EURAMET, EUREKA, EU JU)

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