【摘 要】
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Inorganic perovskite lasers are of particular interest,with much recent work focusing on Fabry-Pérot cavity-forming nanowires.We demonstrate the direct observa
【机 构】
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School of Natural Science,Ulsan National Institute of Science and Technologh,Ulsan 44919,Republic of
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Inorganic perovskite lasers are of particular interest,with much recent work focusing on Fabry-Pérot cavity-forming nanowires.We demonstrate the direct observation of lasing from transverse electromagnetic(TEM)modes with a long coherence time～9.5 ps in coupled CsPbBr3 quantum dots,which dispense with an external cavity resonator and show how the wavelength of the modes can be controlled via two independent tuning-mechanisms.Controlling the pump power allowed us to fine-tune the TEM mode structure to the emission wavelength,thus providing a degree of control over the properties of the lasing signal.The temperature-tuning provided an additional degree of control over the wavelength of the lasing peak,importantly,maintained a constant full width at half maximum(FWHM)over the entire tuning range without mode-hopping.
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