Keywords: near-field, SNOM, photoluminescence, InGaN, diffusion, recombination
PACS: 07.79.Fc, 78.55.Cr, 78.47.jd

KTH Karališkasis technologijos institutas, Kista, Švedija

Aptariami pastarųjų metų pasiekimai plėtojant daugiakanalę skenuojančios artimo lauko optinės mikroskopijos (SAOM) metodiką. Naudojant šį eksperimentinį metodą tuo pat metu galima skenuoti dvimatį fotoliuminescencijos spektrų ir jų dinamikos pasiskirstymą ir bandinio paviršiaus morfologiją. Skenuojančios daugiakanalės mikroskopijos galimybės iliustruojamos polinių InGaN epitaksinių sluoksnių ir nepolinių InGaN/GaN kvantinių duobių tyrimais. SAOM eksperimentai sudarė galimybes ištirti dvimates energijos juostų potencialo variacijas, jų fizikinę prigimtį ir koreliaciją su bandinio paviršiaus morfologija. Taip pat buvo pademonstruotas spindulinės ir nespindulinės rekombinacijos laikų erdvinis netolygumas. Galiausiai parodyta, kaip matuojant keliais SAOM režimais tuo pat metu galima įvertinti ambipolinę krūvininkų difuziją ir jos anizotropiją.

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