You have said 'consciousness emerges in a brain' which seems imply that it has been detected by scientists, if so, it presumably has a form with qualities that have been demonstrated somewhere, in which case it would be interesting to see how they distinguish it as 'consciousness' and not something else. The other view is that it is formless and would not register as particles nor waves, but without it the scientists at CERN would not be able to discover anything nor postulate what they consider 'reality' to be.
As you say, it might be a spurious idea, but a (let's call it) Hindu approach is not to analyse it as a substance but to use it more harmoniously by identifying with it and merging with it, rather than allowing it to become 'self/ego' centred. The idea is to be more conscious and relatively free from being absorbed in mental forms and forces. To communicate this idea to others it is necessary to use words and symbols so that a practical method can be followed.
This is a terribly restricted view of reality. Why should everything be a particle that can be detected by a particle detector? Dark Energy has not been detected yet. So also Dark Matter and Parallel Universes. Even gravity can only be felt through its effects on other bodies but cannot be detected otherwise. The Graviton has not yet been found.
Secondly, we are talking about the Subject itself here. Not about some external object that needs to be detected.
Thirdly, QM does talk of Consciousness and its effects on particles. The Copenhagen Interpretation says...."The act of measurement affects the system, causing the set of probabilities to reduce to only one of the possible values immediately after the measurement. This feature is known as wavefunction collapse."
Consciousness has been detected and measured by science, however it is not a fundamental property of nature, it is an emergent property of neural activity. Now we have found a way to detect it and quantify it, it can become the subject of mainstream science which is more comfortable with things that are quantifiable, and consciousness is measured by an index known as the pertubational complexity index, which is an indicator of the degree of integration of neural activity. What hasn't been detected by science is anything that might correspond to what people refer to as universal consciousness as this would have to be a fundamental property and not a derivative.
The above does not solve all the problems of consciousness however as we still do not understand some of the underlying fundamentals that give rise to subjective experience; how can
aspect be such a profound determinant ? by which I mean, for example, the subjective experience of loudness, say, is really loud, or the taste of chocolate might be really sweet; but the exact same things viewed from a third person aspect are not remotely loud and not remotely sweet at all, all you have is ions silently flowing up synaptic gradients. To reconcile these needs a better understanding of subjectivity and emergence, but I don't think it helps to imagine some sort of ether-like substance that will solve the puzzle, just like magic.