Line-Intensity Mapping and Modeling [OIII] Emission at z > 6

Line-intensity mapping is an emerging technique to produce unprecedented three dimensional maps of large scale structure across cosmic time. Line-intensity mapping surveys measure spatial fluctuations in the collective emission from many individually unresolved galaxies and/or diffuse gas in convenient spectral lines. A number of ongoing and upcoming projects are employing this technique towards diverse and exciting scientific goals, including studies of galaxy evolution, cosmic reionization, and fundamental cosmology. I will overview the compelling science case for line-intensity mapping, and discuss some promising emission line targets for probing the Epoch of Reionization. I will focus on the [OIII] 88 micron emission line, which has been detected all the way out to z~9 in targeted observations of individual galaxies with ALMA. I will describe a simple model for [OIII] emission, discuss the implications of the current ALMA measurements, and comment on the prospects for line-intensity mapping studies with [OIII].