A new principle for management of dopant–dopant and dopant–host interactions by manipulation of mesoscale heterogeneity in a single active material is presented. The proposed mesoscale engineering approach results in dramatically inhomogeneous broadening of dopant, and for the first time show success in simultaneously extending emission bandwidth and flattening spectral shape in a doped glass and fiber.
- Yongze Yu
- Zaijin Fang
- Jianrong Qiu
