Understanding Image Formation: Exploring the Role of Photons and Detectors

[waves and change]

Did you notice the title? Photons observed as Particles and Waves. Of course photons can be 'observed' one way or another and, under special conditions (as in the experiments described) both behaviours can be observed. I saw that the word Duality appears three times in that reference; once in a quote from Feynman (not recent) and twice in the words of the journalist, reporting on the experiment. Have you ever had your words quoted by a journalist? It is not always a reliable process.
But does this really have anything at all to do with the situation of the scale that is described in the OP? The answer to that question is available with simple ray optics. The general opinion of PF is that photons do not help with that question.

Your statement verbatim that duality has been discarded is in complete contradiction to what you just said. You just stated that photons can be observed to be particle like and wave like. That is what duality is. This experiment shows a possible superposition of those properties. This is not the only recent observation of similar phenomena

 

[weirdoguy]

Duality being discarded? Please site references explaining that?

It has been discussed here multiple times... E.g. read this:
https://www.physicsforums.com/threads/why-does-wave-particle-duality-not-exist-anymore.910647/

Ever since quantum mechanics was developed, wave-particle duality is treated only as a heuristic, not any part of a mathematical formalism of quantum mechanics, nor quantum field theory. Reference? Most of textbooks on QM or QFT.

 

[Nugatory]

I suggest you look into this regarding your statement that particles behave as particles and waves behave as waves which is incorrect in many contexts.
https://www.photonics.com/a52250/Photons_Observed_as_Particles_Waves

That is a non-technical PR summary intended for laypeople, so is not an acceptable reference under the physics forums rules (and the phrase "Artist’s impression, inspired by the work of the artist Maurits Cornelis Escher" is something of a warning here). The actual published paper (available free after a mildly annoying registration process) is much more serious but doesn't do much to support any of the informally stated English-language positions being argued in the last few posts.

In any case, we are far off the topic of the original post and thread title, so we can close the thread. Further questions on the nature of photons and the status of wave-particle duality in modern (after 1925) quantum physics should be started in new threads - but please please take a look at some of the many threads on these topics that we already have.