Single-ion magnets(SIMs)are prominent candidates for promoting new technologies in quantum information processing(QIP).Herein,we present two new isostructural oxamato derivatives,namely,{n-Bu_(4)N[Ln(H_(2)edpba)_(2)]}...Single-ion magnets(SIMs)are prominent candidates for promoting new technologies in quantum information processing(QIP).Herein,we present two new isostructural oxamato derivatives,namely,{n-Bu_(4)N[Ln(H_(2)edpba)_(2)]}_(n),Ln=Tb^(3+)(1)and Gd^(3+)(2)[H_(2)edpba^(2-)=N,N’-2,2’-ethylenediphenylenebis(oxamate)],that are thermostable up to∼290℃.Single-crystal X-ray diffraction reveals that 1 and 2 are one-dimensional coordination polymers with a ribbon-like structure,and their metal centers are eight-coordinated with a D_(4d) symmetry.Cryomagnetic studies disclose the presence of slow magnetic relaxation(SMR)behavior for 1 and 2.For 1,the Raman effect dominates the SMR at a zero magnetic field,while Raman,Orbach,and reciprocating thermal behavior(RTB)mechanisms arise at higher fields.Conversely,RTB and the bottleneck effect were observed at 2.Solid-state photoluminescent data display a remarkable green luminescence emission,with intense and sharp bands ranging from 480 to 700 nm in the spectra,which are attributed to the ^(5)D_(4)→^(7)F_(J)(J=6-0)transitions of terbium(Ⅲ)ions.By monitoring the temperaturedependent lifetime of the ^(5)D_(4) state after the intensity decay of the emission band attributed to the ^(5)D_(4)→^(7)F_(5)(546 nm)transition,the complex shows a reasonable thermometric performance with a relative sensitivity of 2.77%K^(-1) at 448 K.1 behaves as a zero-field SIM and as a photoluminescent thermometer.展开更多
Achieving non-reciprocal optical behavior in integrated photonics with high efficiency has long been a challenge.Here,we demonstrate a non-reciprocal magneto-optic response by integrating multilayer 2D CuCrP_(2)S_(6)(...Achieving non-reciprocal optical behavior in integrated photonics with high efficiency has long been a challenge.Here,we demonstrate a non-reciprocal magneto-optic response by integrating multilayer 2D CuCrP_(2)S_(6)(CCPS)onto silicon microring resonators(MRRs).Under an applied magnetic field,the CCPS intralayer ferromagnetic ordering,characterized by easy-plane magneto-crystalline anisotropy,induces asymmetrical modal responses in the clockwise(CW)and counterclockwise(CCW)light propagation directions.The proposed configuration achieves a low insertion loss ranging from 0.15 dB to 1.8 dB and a high isolation ratio of 28 dB at 1550 nm.Notably,it exhibits a significant resonance wavelength splitting of 0.4 nm between the counter propagation directions,supporting a 50 GHz optical bandwidth.Operating directly in the transverse electric(TE)mode,it aligns with the main polarization used in silicon photonics circuits,eliminating the need for additional polarization management.The device is ultra-compact,with a 2D flake interaction length ranging from 22μm to 55μm and a thickness between 39 nm and 62 nm.Its operation range covers the entire C-band with a bandwidth of up to 100 nm.These attributes make our hybrid CCPS/Si device ideal for advanced non-reciprocal optical applications in the short-wave infrared(SWIR)spectrum,crucial for enhancing the resilience of optical systems against back-reflections.展开更多
基金supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)Fundacao de Amparoà Pesquisa do Estado de Minas Gerais(FAPEMIG)+3 种基金Fundacao Carlos Chagas Filho de Amparoà Pesquisa do Estado do Rio de Janeiro(FAPERJ)Fundacao de Aperfeiçoamento de Pessoal de Nível Superior(CAPES,Finance Code 001)the Fundacao de AmparoàPesquisa do Estado de Sao Paulo(FAPESP)for the postdoctoral fellowship(2024/00198-0)for RVP,project 2021/08111-2for funding the EMU Project 2023/17024-1.
文摘Single-ion magnets(SIMs)are prominent candidates for promoting new technologies in quantum information processing(QIP).Herein,we present two new isostructural oxamato derivatives,namely,{n-Bu_(4)N[Ln(H_(2)edpba)_(2)]}_(n),Ln=Tb^(3+)(1)and Gd^(3+)(2)[H_(2)edpba^(2-)=N,N’-2,2’-ethylenediphenylenebis(oxamate)],that are thermostable up to∼290℃.Single-crystal X-ray diffraction reveals that 1 and 2 are one-dimensional coordination polymers with a ribbon-like structure,and their metal centers are eight-coordinated with a D_(4d) symmetry.Cryomagnetic studies disclose the presence of slow magnetic relaxation(SMR)behavior for 1 and 2.For 1,the Raman effect dominates the SMR at a zero magnetic field,while Raman,Orbach,and reciprocating thermal behavior(RTB)mechanisms arise at higher fields.Conversely,RTB and the bottleneck effect were observed at 2.Solid-state photoluminescent data display a remarkable green luminescence emission,with intense and sharp bands ranging from 480 to 700 nm in the spectra,which are attributed to the ^(5)D_(4)→^(7)F_(J)(J=6-0)transitions of terbium(Ⅲ)ions.By monitoring the temperaturedependent lifetime of the ^(5)D_(4) state after the intensity decay of the emission band attributed to the ^(5)D_(4)→^(7)F_(5)(546 nm)transition,the complex shows a reasonable thermometric performance with a relative sensitivity of 2.77%K^(-1) at 448 K.1 behaves as a zero-field SIM and as a photoluminescent thermometer.
文摘Achieving non-reciprocal optical behavior in integrated photonics with high efficiency has long been a challenge.Here,we demonstrate a non-reciprocal magneto-optic response by integrating multilayer 2D CuCrP_(2)S_(6)(CCPS)onto silicon microring resonators(MRRs).Under an applied magnetic field,the CCPS intralayer ferromagnetic ordering,characterized by easy-plane magneto-crystalline anisotropy,induces asymmetrical modal responses in the clockwise(CW)and counterclockwise(CCW)light propagation directions.The proposed configuration achieves a low insertion loss ranging from 0.15 dB to 1.8 dB and a high isolation ratio of 28 dB at 1550 nm.Notably,it exhibits a significant resonance wavelength splitting of 0.4 nm between the counter propagation directions,supporting a 50 GHz optical bandwidth.Operating directly in the transverse electric(TE)mode,it aligns with the main polarization used in silicon photonics circuits,eliminating the need for additional polarization management.The device is ultra-compact,with a 2D flake interaction length ranging from 22μm to 55μm and a thickness between 39 nm and 62 nm.Its operation range covers the entire C-band with a bandwidth of up to 100 nm.These attributes make our hybrid CCPS/Si device ideal for advanced non-reciprocal optical applications in the short-wave infrared(SWIR)spectrum,crucial for enhancing the resilience of optical systems against back-reflections.
