Stochastic light concentration from 3D to 2D reveals ultraweak chemi- and bioluminescence.

ABSTRACT: For countless applications in science and technology, light must be concentrated, and concentration is classically achieved with reflective and refractive elements. However, there is so far no efficient way, with a 2D detector, to detect photons produced inside an extended volume with a broad or isotropic angular distribution. Here, with theory and experiment, we propose to stochastically transform and concentrate a volume into a smaller surface, using a high-albedo Ulbricht cavity and a small exit orifice through cavity walls. A 3D gas of photons produced inside the cavity is transformed with a 50% number efficiency into a 2D Lambertian emitting orifice with maximal radiance and a much smaller size. With high-albedo quartz-powder cavity walls ([Formula: see text]), the orifice area is [Fo

SUBMITTER: Khaoua I 

PROVIDER: S-EPMC8113247 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature