Surface enhanced Raman scattering(SERS)is a fingerprint spectral technique whose performance is highly dependent on the physicochemical properties of the substrate materials.In addition to the traditional plasmonic me...Surface enhanced Raman scattering(SERS)is a fingerprint spectral technique whose performance is highly dependent on the physicochemical properties of the substrate materials.In addition to the traditional plasmonic metal substrates that feature prominent electromagnetic enhancements,boosted SERS activities have been reported recently for various categories of non-metal materials,including graphene,MXenes,transition-metal chalcogens/oxides,and conjugated organic molecules.Although the structural compositions of these semiconducting substrates vary,chemical enhancements induced by interfacial charge transfer are often the major contributors to the overall SERS behavior,which is distinct from that of the traditional SERS based on plasmonic metals.Regarding charge-transfer-induced SERS enhancements,this short review introduces the basic concepts underlying the SERS enhancements,the most recent semiconducting substrates that use novel manipulation strategies,and the extended applications of these versatile substrates.展开更多
We present an original self-error-rejecting photonic qubit transmission scheme for both the polarization and spatial states of photon systems transmitted over collective noise channels. In our scheme, we use simple li...We present an original self-error-rejecting photonic qubit transmission scheme for both the polarization and spatial states of photon systems transmitted over collective noise channels. In our scheme, we use simple linear-optical elements, including half-wave plates, 50:50 beam splitters, and polarization beam splitters, to convert spatial-polarization modes into different time bins. By using postselection in different time bins, the success probability of obtaining the uncorrupted states approaches 1/4 for singlephoton transmission, which is not influenced by the coefficients of noisy channels. Our self-error-rejecting transmission scheme can be generalized to hyperentangled n-photon systems and is useful in practical high-capacity quantum communications with photon systems in two degrees of freedom.展开更多
基金supported by the National Natural Science Foundation of China(51772319,51772320,51972331,and 61575196)the Youth Innovation Promotion Association of the Chinese Academy of Sciences(2018356)+7 种基金the External Cooperation Program of the Chinese Academy of Sciences(121E32KYSB20190008)the Outstanding Youth Fund of Jiangxi Province(20192BCBL23027)the Natural Science Foundation of Jiangxi Province(20181ACB20011)the Six Talent Peaks Project of Jiangsu Province(XCL-170)the Science and Technology Project of Nanchang(2017-SJSYS-008)the Chongqing Talents Program(grant no.CQYC201905041)the Chongqing Scientific and Technological Program Project of China(cstc2019jcyj-msxmX0663)the Science and Technology Research Program of Chongqing Municipal Education Commission(grant no.KJQN201904102).
文摘Surface enhanced Raman scattering(SERS)is a fingerprint spectral technique whose performance is highly dependent on the physicochemical properties of the substrate materials.In addition to the traditional plasmonic metal substrates that feature prominent electromagnetic enhancements,boosted SERS activities have been reported recently for various categories of non-metal materials,including graphene,MXenes,transition-metal chalcogens/oxides,and conjugated organic molecules.Although the structural compositions of these semiconducting substrates vary,chemical enhancements induced by interfacial charge transfer are often the major contributors to the overall SERS behavior,which is distinct from that of the traditional SERS based on plasmonic metals.Regarding charge-transfer-induced SERS enhancements,this short review introduces the basic concepts underlying the SERS enhancements,the most recent semiconducting substrates that use novel manipulation strategies,and the extended applications of these versatile substrates.
基金supported by the National Natural Science Foundation of China(Grant Nos.61675028,and 11674033)the Fundamental Research Funds for the Central Universities(Grant No.2015KJJCA01)and the National High Technology Research and Development Program of China(Grant No.2013AA122902)
文摘We present an original self-error-rejecting photonic qubit transmission scheme for both the polarization and spatial states of photon systems transmitted over collective noise channels. In our scheme, we use simple linear-optical elements, including half-wave plates, 50:50 beam splitters, and polarization beam splitters, to convert spatial-polarization modes into different time bins. By using postselection in different time bins, the success probability of obtaining the uncorrupted states approaches 1/4 for singlephoton transmission, which is not influenced by the coefficients of noisy channels. Our self-error-rejecting transmission scheme can be generalized to hyperentangled n-photon systems and is useful in practical high-capacity quantum communications with photon systems in two degrees of freedom.
