Organic semiconductor is one of the most promising luminescent and lasing materials that can be chemically synthesized with a controllable performance and possess high cross-section of stimulated emission . Organic se...Organic semiconductor is one of the most promising luminescent and lasing materials that can be chemically synthesized with a controllable performance and possess high cross-section of stimulated emission . Organic semiconductor laser diodes （OSLDs） can be prepared by simple processing technologies and integrated easily with other optoelectronic devices. As a result, OSLDs would have appealing applications in low cost, compact, flexible and tunable lasers with spectral region from ultraviolet to near infrared . Although lasing has been widely demonstrated under optical pumping, electrically pumped OSLDs are rather difficult to realize because the expected high threshold current is hard to reach in low electrical conductivity organic semiconductors and electroluminescence （EL） efficiency is much decreased under high current.展开更多
We demonstrate a simple method to obtain accurate optical waveforms with a gigahertz-level programmable modulation bandwidth and a watt-level output power for wideband optical control of free atoms and molecules.Arbit...We demonstrate a simple method to obtain accurate optical waveforms with a gigahertz-level programmable modulation bandwidth and a watt-level output power for wideband optical control of free atoms and molecules.Arbitrary amplitude and phase modulations are transferred from microwave to light with a low-power fiber electro-optical modulator.The sub-milliwatt optical sideband is co-amplified with the optical carrier in a power-balanced fashion through a tapered semiconductor amplifier(TSA).By automatically keeping TSA near saturation in a quasi-continuous manner,typical noise channels associated with pulsed high-gain amplifications are efficiently suppressed.As an example application,we demonstrate interleaved cooling and trapping of two rubidium isotopes with coherent nanosecond pulses.展开更多
基金supported by the CAS Innovation Program, the National Natural Science Foundation of China (51503196, 61775211, 61704170, 61405195 and 61774154)the financial support from the State Key Laboratory of Luminescence and Applications
文摘Organic semiconductor is one of the most promising luminescent and lasing materials that can be chemically synthesized with a controllable performance and possess high cross-section of stimulated emission . Organic semiconductor laser diodes （OSLDs） can be prepared by simple processing technologies and integrated easily with other optoelectronic devices. As a result, OSLDs would have appealing applications in low cost, compact, flexible and tunable lasers with spectral region from ultraviolet to near infrared . Although lasing has been widely demonstrated under optical pumping, electrically pumped OSLDs are rather difficult to realize because the expected high threshold current is hard to reach in low electrical conductivity organic semiconductors and electroluminescence （EL） efficiency is much decreased under high current.
基金supported by the National Key Research and Development Program of China(Nos.2016YFA0302000 and 2017YFA0304204)the National Natural Science Foundation of China(NSFC)(No.12074083)the National Key Scientific Instrument and Equipment Development Project(No.12027806)。
文摘We demonstrate a simple method to obtain accurate optical waveforms with a gigahertz-level programmable modulation bandwidth and a watt-level output power for wideband optical control of free atoms and molecules.Arbitrary amplitude and phase modulations are transferred from microwave to light with a low-power fiber electro-optical modulator.The sub-milliwatt optical sideband is co-amplified with the optical carrier in a power-balanced fashion through a tapered semiconductor amplifier(TSA).By automatically keeping TSA near saturation in a quasi-continuous manner,typical noise channels associated with pulsed high-gain amplifications are efficiently suppressed.As an example application,we demonstrate interleaved cooling and trapping of two rubidium isotopes with coherent nanosecond pulses.
