I would narrow down and define what you mean by meditation or be prepared to engage with the variety of techniques that are out there in the world. Meditation exists in Buddhism, Hinduism, Christianity and probably most other religious traditions. Within Buddhism, which I know more about than the other religions, there is a plethora of techniques and worldviews. Mahasi noting is different than Shikantaza which is different than Dzogchen. Even with a specific tradition like Japanese Soto Zen different lineages approach practice differently. I would focus in on a specific practice or lineage rather than meditation broadly. However, meditation broadly considered is implicitly if not explicitly phenomenological. Within the Buddhist tradition there is a lot of material on Zen, Vipassana and the various Tibetan traditions; one of the three might be a good place to start. The writings of Francisco Varela might also be useful since he was influenced by Husserl, Merleau-Ponty, neuroscience and Tibetan Buddhism. I sit zazen so if your looking for someone to interview just PM me.