Self-chaotic dual-mode and tri-mode microcavity lasers have been recently proposed and demonstrated for highspeed random number generation.Here,we report the characteristics of irregular pulse packages and self-chaos ...Self-chaotic dual-mode and tri-mode microcavity lasers have been recently proposed and demonstrated for highspeed random number generation.Here,we report the characteristics of irregular pulse packages and self-chaos operation for a dual-mode circular-sided square microcavity laser.In addition to the mode interaction between the fundamental and first-order transverse modes,we observed irregular pulse packages due to the mode beating of near-degenerate modes for the first time to our best knowledge.Moreover,a successive route from periodic-one and periodic-three states to chaos is first experimentally illustrated by increasing injection current.The chaotic state is observed over a current range of 10 mA,and the maximum chaos effective bandwidth of 22.4 GHz is realized with a flatness of±4 d B.Chaotic characteristics are also investigated for different longitudinal modes,which indicates that the self-chaotic microlaser can provide robust parallel chaotic outputs for practical application.展开更多
A high-Q hybrid plasmonic-photonic microresonator,which consists of a dielectric microdisk hybridized with a plasmonic nanoantenna dimer,enables an enlarged local density of states of the optical field and chiral prop...A high-Q hybrid plasmonic-photonic microresonator,which consists of a dielectric microdisk hybridized with a plasmonic nanoantenna dimer,enables an enlarged local density of states of the optical field and chiral propagation of photons inside the cavity.展开更多
The emerging hybrid integrated quantum photonics combines the advantages of different functional components into a single chip to meet the stringent requirements for quantum information processing.Despite the tremendo...The emerging hybrid integrated quantum photonics combines the advantages of different functional components into a single chip to meet the stringent requirements for quantum information processing.Despite the tremendous progress in hybrid integrations of III-V quantum emitters with silicon-based photonic circuits and superconducting single-photon detectors,on-chip optical excitations of quantum emitters via miniaturized lasers towards single-photon sources(SPSs)with low power consumptions,small device footprints,and excellent coherence properties is highly desirable yet illusive.In this work,we present realizations of bright semiconductor SPSs heterogeneously integrated with on-chip electrically-injected microlasers.Different from previous one-by-one transfer printing technique implemented in hybrid quantum dot(QD)photonic devices,multiple deterministically coupled QD-circular Bragg Grating(CBG)SPSs were integrated with electrically-injected micropillar lasers at one time via a potentially scalable transfer printing process assisted by the wide-field photoluminescence(PL)imaging technique.Optically pumped by electrically-injected microlasers,pure single photons are generated with a high-brightness of a count rate of 3.8 M/s and an extraction efficiency of 25.44%.Such a high-brightness is due to the enhancement by the cavity mode of the CBG,which is confirmed by a Purcell factor of 2.5.Our work provides a powerful tool for advancing hybrid integrated quantum photonics in general and boosts the developments for realizing highly-compact,energy-efficient and coherent SPSs in particular.展开更多
A Brillouin-assisted 80-GHz-spaced dual-comb source with a reconfigurable repetition frequency difference ranging from 48 MHz to 1.486 GHz is demonstrated.Two pairs of dual-pump seeds with an interval offset produce t...A Brillouin-assisted 80-GHz-spaced dual-comb source with a reconfigurable repetition frequency difference ranging from 48 MHz to 1.486 GHz is demonstrated.Two pairs of dual-pump seeds with an interval offset produce the corresponding dual Brillouin lasers in two fiber loops,and then the Brillouin lasers give rise to dual combs via the cavity-enhanced cascaded four-wave mixing effect.The repetition frequency difference is determined by the interval offset of the dual-pump seeds,which is induced by the Brillouin frequency shift difference between different fibers in a frequency shifter.Each comb provides 22 lasing lines,and the central 10 lines in a 20-dB power deviation feature high optical signal-to-noise ratios exceeding 50 dB.The linewidths of the dual-comb beating signals are less than 300 Hz,and the absolute linewidths of the comb lines are around 1.5 kHz.The dual-comb source enables substantial repetition frequency differences from 48 MHz to 1.486 GHz by changing the pluggable fibers in the frequency shifter.展开更多
An optical black-hole cavity based on transformation optics enables Q-factor enhancement and strong field confinement,by eliminating the intrinsic radiation loss of the conventional whispering-gallery modes,holding po...An optical black-hole cavity based on transformation optics enables Q-factor enhancement and strong field confinement,by eliminating the intrinsic radiation loss of the conventional whispering-gallery modes,holding potential for applications in energy harvesting and optoelectronics.展开更多
基金National Natural Science Foundation of China(12274407,61874113,61935018,62122073)。
文摘Self-chaotic dual-mode and tri-mode microcavity lasers have been recently proposed and demonstrated for highspeed random number generation.Here,we report the characteristics of irregular pulse packages and self-chaos operation for a dual-mode circular-sided square microcavity laser.In addition to the mode interaction between the fundamental and first-order transverse modes,we observed irregular pulse packages due to the mode beating of near-degenerate modes for the first time to our best knowledge.Moreover,a successive route from periodic-one and periodic-three states to chaos is first experimentally illustrated by increasing injection current.The chaotic state is observed over a current range of 10 mA,and the maximum chaos effective bandwidth of 22.4 GHz is realized with a flatness of±4 d B.Chaotic characteristics are also investigated for different longitudinal modes,which indicates that the self-chaotic microlaser can provide robust parallel chaotic outputs for practical application.
基金supported by National Natural Science Foundation of China(No.11825402,No.11654003,No.11974341,and No.11704375).
文摘A high-Q hybrid plasmonic-photonic microresonator,which consists of a dielectric microdisk hybridized with a plasmonic nanoantenna dimer,enables an enlarged local density of states of the optical field and chiral propagation of photons inside the cavity.
基金National Natural Science Foundation of China(62035017,12074442)National Key Research and Development Program of China(2018YFA0306103)+1 种基金Science and Technology Program of Guangzhou(202103030001)Hisilicon Technologies CO.,LIMITED and the national super-computer center in Guangzhou.
文摘The emerging hybrid integrated quantum photonics combines the advantages of different functional components into a single chip to meet the stringent requirements for quantum information processing.Despite the tremendous progress in hybrid integrations of III-V quantum emitters with silicon-based photonic circuits and superconducting single-photon detectors,on-chip optical excitations of quantum emitters via miniaturized lasers towards single-photon sources(SPSs)with low power consumptions,small device footprints,and excellent coherence properties is highly desirable yet illusive.In this work,we present realizations of bright semiconductor SPSs heterogeneously integrated with on-chip electrically-injected microlasers.Different from previous one-by-one transfer printing technique implemented in hybrid quantum dot(QD)photonic devices,multiple deterministically coupled QD-circular Bragg Grating(CBG)SPSs were integrated with electrically-injected micropillar lasers at one time via a potentially scalable transfer printing process assisted by the wide-field photoluminescence(PL)imaging technique.Optically pumped by electrically-injected microlasers,pure single photons are generated with a high-brightness of a count rate of 3.8 M/s and an extraction efficiency of 25.44%.Such a high-brightness is due to the enhancement by the cavity mode of the CBG,which is confirmed by a Purcell factor of 2.5.Our work provides a powerful tool for advancing hybrid integrated quantum photonics in general and boosts the developments for realizing highly-compact,energy-efficient and coherent SPSs in particular.
基金National Key Research and Development Program of China(2021YFB2800600)National Natural Science Foundation of China(61935018)。
文摘A Brillouin-assisted 80-GHz-spaced dual-comb source with a reconfigurable repetition frequency difference ranging from 48 MHz to 1.486 GHz is demonstrated.Two pairs of dual-pump seeds with an interval offset produce the corresponding dual Brillouin lasers in two fiber loops,and then the Brillouin lasers give rise to dual combs via the cavity-enhanced cascaded four-wave mixing effect.The repetition frequency difference is determined by the interval offset of the dual-pump seeds,which is induced by the Brillouin frequency shift difference between different fibers in a frequency shifter.Each comb provides 22 lasing lines,and the central 10 lines in a 20-dB power deviation feature high optical signal-to-noise ratios exceeding 50 dB.The linewidths of the dual-comb beating signals are less than 300 Hz,and the absolute linewidths of the comb lines are around 1.5 kHz.The dual-comb source enables substantial repetition frequency differences from 48 MHz to 1.486 GHz by changing the pluggable fibers in the frequency shifter.
文摘An optical black-hole cavity based on transformation optics enables Q-factor enhancement and strong field confinement,by eliminating the intrinsic radiation loss of the conventional whispering-gallery modes,holding potential for applications in energy harvesting and optoelectronics.
