Direct observation of exciton–exciton interactions - Nature Here we introduce a coherent two-dimensional spectroscopic method that provides a signal only in case that the presence of one exciton influences the behavior of another one Exemplarily, we
Effects of Pressure on Exciton Absorption and Emission in . . . The PL spectra under pressure have multiple peaks that red-shift with increasing pressure gradually The quenching of the PL coincides with the disappearance of the exciton absorption peak, which recovers on the decompression cycle, analogous to CsPbBr 3 QDs
Spectroscopic signatures of biexcitons: A case study in . . . Using three spectroscopic techniques—photoluminescence (PL) and two variations of two-dimensional electronic spectroscopy (2DES)—we map coherent one-quantum and two-quantum correlations to gain deeper insight into the biexciton characteristics
Imaging exciton interactions in two-dimensional materials and . . . The interlayer exciton energy, and hence exciton interactions, can be tuned by applying a gate voltage or changes in excitation power By measuring shifts in the interlayer exciton energy resonance with photoluminescence spectroscopy, one can indirectly observe changes in the band structure
Exciton control in a room temperature bulk semiconductor with . . . Controlling the excitonic optical properties of room temperature semiconductors using time-dependent perturbations is key to future optoelectronic applications The optical Stark effect in bulk and low-dimensional materials has recently shown exciton shifts below 20 meV
Exciton Mapping at Subwavelength Scales in Two-Dimensional . . . By performing core-loss EELS at the same regions, we observe that variations in the excitonic signature follow the chemical composition The exciton peaks are observed to be broader at interfaces and heterogeneous regions, possibly due to interface roughness and alloying effects