Tesla black light could be a candidate for research- what he developed when he was making ac currents and wifi.

But we know dark matter by what it is not.

Neutralinos and Axions are the prime candidates for particles of dark matter.

To find the dark matter, there are four ways, but i think the fourth mentioned has the most hope- to infer it with already available technologies. To catch them requires shielding from the earth, and these technologies have been developed with JWST and the Parker Sun Observatory.