Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we ext...Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we extend the use of squeezed light to the realm of ultrafast quantum science.We demonstrate the generation of the shortest ultrafast synthesized quantum light pulses spanning 0.33 to 0.73 PHz by a degenerate four-wave mixing nonlinear process.Experimental metrology results confirm that these pulses exhibit amplitude squeezing,which is consistent with theoretical predictions.Moreover,we observe the temporal dynamics of amplitude uncertainty of the squeezed light,demonstrating that quantum uncertainty of light is controllable and tunable in real time.Additionally,we demonstrate control over the quantum state of light by switching between amplitude and phase squeezing.Our ability to generate and manipulate ultrafast,squeezed,synthesized light waveforms with attosecond resolution unlocks exciting possibilities for quantum technologies,including petahertz-scale secure quantum communication,quantum computing,and ultrafast spectroscopy.As an example,we introduce an attosecond quantum encryption protocol leveraging squeezed synthesized light for secure digital communication at unprecedented speeds.This work paves the way for exploring quantum uncertainty dynamics and establishes the foundation for the emerging ultrafast and attosecond quantum science fields.展开更多
Circular dichroism(CD)spectroscopy,widely used for chiral sensing,has been limited by the detection sensitivity.Enhancing optical chirality in the light fields interacting with chiral molecules is crucial for achievin...Circular dichroism(CD)spectroscopy,widely used for chiral sensing,has been limited by the detection sensitivity.Enhancing optical chirality in the light fields interacting with chiral molecules is crucial for achieving ultrasensitive chiral detection.Here,we present a new paradigm for ultrasensitive chiral detection by creating accessible chiral hotspots using a toroidal dipole Fabry–Perot bound state in the continuum(TD FP-BIC)metasurface.BIC resonance is achieved by controlling the coupling between the TD resonance and its multilayer reflector-induced perfect mirror image.This method enables unprecedented local maximum and average optical chirality enhancements of up to 6×10^(4)-fold and 2×10^(3)-fold,respectively,within non-structured regions,resulting in an 866-fold increase in CD signals compared to chiral molecules alone without nanostructures.Our results pave the way for enhanced light–matter interactions and ultrasensitive enantiomeric operation.展开更多
基金funded by the Gordon and Betty Moore Foundation Grant(GBMF 11476)to M.Hassansupported by the Air Force Office of Scientific Research under award number FA9550-22-1-0494+8 种基金support from:European Research Council AdG NOQIAMCIN/AEI(PGC20180910.13039/501100011033,CEX2019-000910 S/10.13039/501100011033Plan National STAMEENA PID2022-139099NB)project funded by MCIN/AEI/10.13039/501100011033the“European Union Next Generation EU/PRTR”(PRTR-C17.I1),FPI)QUANTERA DYNAMITE PCI2022-132919,Fundació CellexFundació Mir-PuigFundació CellexFundació Mir-Puig.
文摘Advancements in quantum optics and squeezed light generation have revolutionized various fields of quantum science over the past three decades,with notable applications such as gravitational wave detection.Here,we extend the use of squeezed light to the realm of ultrafast quantum science.We demonstrate the generation of the shortest ultrafast synthesized quantum light pulses spanning 0.33 to 0.73 PHz by a degenerate four-wave mixing nonlinear process.Experimental metrology results confirm that these pulses exhibit amplitude squeezing,which is consistent with theoretical predictions.Moreover,we observe the temporal dynamics of amplitude uncertainty of the squeezed light,demonstrating that quantum uncertainty of light is controllable and tunable in real time.Additionally,we demonstrate control over the quantum state of light by switching between amplitude and phase squeezing.Our ability to generate and manipulate ultrafast,squeezed,synthesized light waveforms with attosecond resolution unlocks exciting possibilities for quantum technologies,including petahertz-scale secure quantum communication,quantum computing,and ultrafast spectroscopy.As an example,we introduce an attosecond quantum encryption protocol leveraging squeezed synthesized light for secure digital communication at unprecedented speeds.This work paves the way for exploring quantum uncertainty dynamics and establishes the foundation for the emerging ultrafast and attosecond quantum science fields.
基金National Key Research and Development Program of China(2023YFF0615604)National Natural Science Foundation of China(62192770,62305252,62205246,62475192,61925504,62020106009,62192771)+3 种基金Science and Technology Commission of Shanghai Municipality(21JC1406100,22ZR1432400)Shanghai Municipal Science and Technology Major Project(2021SHZDZX0100)Shanghai Pilot Program for Basic ResearchFundamental Research Funds for the Central Universities。
文摘Circular dichroism(CD)spectroscopy,widely used for chiral sensing,has been limited by the detection sensitivity.Enhancing optical chirality in the light fields interacting with chiral molecules is crucial for achieving ultrasensitive chiral detection.Here,we present a new paradigm for ultrasensitive chiral detection by creating accessible chiral hotspots using a toroidal dipole Fabry–Perot bound state in the continuum(TD FP-BIC)metasurface.BIC resonance is achieved by controlling the coupling between the TD resonance and its multilayer reflector-induced perfect mirror image.This method enables unprecedented local maximum and average optical chirality enhancements of up to 6×10^(4)-fold and 2×10^(3)-fold,respectively,within non-structured regions,resulting in an 866-fold increase in CD signals compared to chiral molecules alone without nanostructures.Our results pave the way for enhanced light–matter interactions and ultrasensitive enantiomeric operation.
