Photonic and electronic state interactions in BaTiO3 based Optical Microcavity

TL;DR

This study investigates the interaction between photonic and electronic states in a BaTiO3-based optical microcavity, revealing enhanced absorption and tunable emission, with implications for nonlinear optics and photonic devices.

Contribution

It demonstrates the control of spontaneous emission and absorption dynamics in a BaTiO3 microcavity, highlighting the role of strong third-order nonlinearity in active photonic structures.

Findings

Dominant excited state absorption due to third-order nonlinearity

Photoluminescence tunability by cavity mode

Potential for nonlinear optical device applications

Abstract

The photonic modes mediated absorption dynamics at femtosecond time scales along with the control of spontaneous emission tunability are investigated all-dielectric optical microcavity having BaTiO3 (BTO) as defect layer. The cavity-enhanced transient absorption reveals the dominant excited state absorption (ESA) of both photonic and electronic modes due to strong third-order optical nonlinearity influence. Photoluminescence of BTO is found to be guided and tuned by the photonic cavity mode. Such active photonic structures can be envisaged as a potential candidate in nonlinear optics and photonic device applications.