Fig. 3: Lasing properties of BPCBT microwires.
From: Stable organic self-assembled microwire lasers for chemical vapor sensing
a Emission spectra from a single BPCBT microwire under different pump fluences of a 400 nm pulsed laser (~200 fs, 1 kHz). Inset is optical microscopy image of microwire tip. b Emission intensity (black) and FWHM (red) as a function of pump energy. c Electric-field distributions in the microwires (top, 1-μm length; bottom, 2-μm length) as FP-type optical resonators. d Plots of λ2/2Δλ versus the length of microwires and the linear fit according to FP-type resonance. e Lasing spectra of microwire at initial state, after 100 k pulses and 200 k pulses at RT. f Lasing intensities of microwire at RT and 60 °C during a series of excitation laser pulses. The DCM-doped microsphere laser was used as a control sample.
