Abstract
Quantum optics deals with the quantum physics of light-matter interactions traditionally in simple (artificial) atomic or molecular systems, which has laid the foundations of and led to the modern quantum information science and technologies. In this presentation, I will talk about my research on exploring quantum optics in complex molecules and two-dimensional materials. In the first part, I will discuss my development of quantum light spectroscopies to elucidate quantum effects (single-photon events and coherent dynamics) in photosynthetic complexes and semiconducting polymers. In the second part, I will speak about my efforts in engineering quantum light-matter interactions (two-photon interference and single-photon emission) in metasurface and layered materials for optical quantum information processing.  I will conclude with a brief outlook for future directions in elucidating coherence and entanglement in condensed matter via quantum optics.