Hey there Gedvidas Bikulcius! When it comes to aluminum oxide pores and light absorption, the orientation of the pores indeed plays a significant role. Now, assuming (as in the note) we've got the same pore diameter, let's dive into it.

Pores perpendicular to the aluminum substrate tend to create a more structured and ordered arrangement. This alignment can lead to enhanced light absorption due to improved light-trapping effects. Think of it like organized soldiers standing at attention, catching more light.

On the flip side, when the pores are parallel to each other with pairs not aligned, creating irregular deviations from perpendicular to the substrate, it introduces a bit of chaos. This lack of alignment might result in less efficient light absorption compared to the neatly organized perpendicular pores.

In a nutshell, the more orderly arrangement of pores, like a disciplined formation, tends to absorb light more effectively. So, in your scenario, those aluminum oxide pores standing perpendicular to the substrate are likely to be the better light absorbers.

Dear Kaushik Shandilya, I agree with you if we are talking about total reflection of light. How about specular light reflection?

Gedvidas

Уважаемый Гедвидас Бикульцюс! Вы подняли крайне интересную тему. Ориентация пор при отражении света будет влиять прежде всего на рассеивании излучения. При упорядоченном расположении пор будет скорее дифракция, при хаотическом - рассеивание. Вероятно это принципиальная разница.