You can find information on the experimental setup for nanostructured aluminium SPR fabricated via EBL in a recent study by Feifei Zhang et al.

Article Long-term stability of plasmonic resonances sustained by eva...

The fabricated Al nanodisks had diameters ranging from 70 to 160 nm, with a height of 50 nm. The pitch was 2.5 times the diameter.

yes, that depends on the gemeotry of nanoparticles and pitch of array, so first be sure which wavelength u are interested in

Thank you for your input Feifei Zhang . I enjoyed reading your paper! As you rightly highlighted, the SPR peak is dependent on the geometric factors of the motifs as well as the periodic arrangement. As I understand from your paper (Fig. 4, attached), the Fano resonance ranges from about 340nm (D=70nm) to 630nm (D=160nm).

Do you have/know any paper that has evaluated the effect of pitch in Al nanodisk arrays?

hello Ali, here are some articles related

Beyond Noble Metals: High Q-Factor Aluminum Nanoplasmonics

Lattice modes and plasmonic linewidth engineering in gold and aluminum nanoparticle arrays

Broadband scattering by an aluminum

nanoparticle array as a white pixel in

commercial color printing applications (my OE accepted, will be online soon )

actually I also have articles under publication about this particular issue, I will share with u when they are accepted.

however, the lattice modes are only pitch dependent, u could find a lot refs about nanodisk array like Au and Ag

here is also a nice review on lattice mode

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

best

FF

Ali Reza Jahangiri hello Ali, as I mentioned before, here is one of my articles on the pitch of Al nanodisk.

Article Influence of order to disorder transitions on the optical pr...

https://pubs.rsc.org/en/content/articlelanding/2020/nr/d0nr06334g#!divAbstract