Figure 3
From: Organic Single-Crystal Light-Emitting Transistor Coupling with Optical Feedback Resonators
Organic single-crystal optical coupler.
(a) A schematic diagram and optical micrographs of the organic single-crystal optical coupler composed of a small BP3T crystal with parallel edges laminated on top of a larger BP3T crystal to form a bilaminar crystal arrangement. (b) The photoluminescence spectrum of the optical coupler as a function of pump laser fluence. Both the unilaminar (top) and bilaminar crystals (bottom) were excited. (Insets) Pictures of the organic single crystals contain the yellow lines indicating the excitation position. (c) Comparison of the laser-fluence-dependent integrated intensities of the (0–1) (λ = 576 nm) peaks between the unilaminar (black square) and bilaminar (red circle) regions.
