Buividas R, Aharonovich I, Seniutinas G, Wang XW, Rapp L, Rode AV, Taniguchi T, Juodkazis S. Photoluminescence from voids created by femtosecond-laser pulses inside cubic-BN.
Opt Lett 2015;
40:5711-5713. [PMID:
26670493 DOI:
10.1364/ol.40.005711]
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Abstract
Photoluminescence (PL) from femtosecond-laser-modified regions inside cubic-boron nitride (c-BN) was measured under UV and visible light excitation. Bright PL at the red spectral range was observed, with a typical excited state lifetime of ∼4 ns. Sharp emission lines are consistent with PL of intrinsic vibronic defects linked to the nitrogen vacancy formation (via Frenkel pair) observed earlier in high-energy electron-irradiated and ion-implanted c-BN. These, formerly known as the radiation centers, RC1, RC2, and RC3, have been identified at the locus of the voids formed by a single femtosecond-laser pulse. The method is promising to engineer color centers in c-BN for photonic applications.
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