We designed a low-filling-factor and polarization-sensitive superconducting nanowire single photon detector(SNSPD), which can achieve a high absorption efficiency and counting rate simultaneously. Numerical simulation...We designed a low-filling-factor and polarization-sensitive superconducting nanowire single photon detector(SNSPD), which can achieve a high absorption efficiency and counting rate simultaneously. Numerical simulations show that high absorption efficiency can be achieved by low-filling-factor SNSPDs with a silicon slot and silver reflector. The absorptance of the NbN nanowire for a transverse magnetic(TM) wave at the wavelength of 1550 nm can be 84.4% when the filling factor is only 16.5%, and the corresponding polarization extinction ratio(PER) is 562.9;the absorptance of the NbN nanowire for a transverse electric(TE) wave can be 67.0% when the filling factor is only 11.7%, and the PER is 7.4.展开更多
Recently,the photon–magnon coherent interaction based on the collective spins excitation in ferromagnetic materials has been achieved experimentally.Under the prospect,the magnons are proposed to store and process qu...Recently,the photon–magnon coherent interaction based on the collective spins excitation in ferromagnetic materials has been achieved experimentally.Under the prospect,the magnons are proposed to store and process quantum information.Meanwhile,cavity-optomagnonics which describes the interaction between photons and magnons has been developing rapidly as an interesting topic of the cavity quantum electrodynamics.Here in this short review,we mainly introduce the recent theoretical and experimental progress in the field of optomagnetic coupling and optical manipulation based on cavity-optomagnonics.According to the frequency range of the electromagnetic field,cavity optomagnonics can be divided into microwave cavity optomagnonics and optical cavity optomagnonics,due to the different dynamics of the photon–magnon interaction.As the interaction between the electromagnetic field and the magnetic materials is enhanced in the cavity-optomagnonic system,it provides great significance to explore the nonlinear characteristics and quantum properties for different magnetic systems.More importantly,the electromagnetic response of optomagnonics covers the frequency range from gigahertz to terahertz which provides a broad frequency platform for the multi-mode controlling in quantum systems.展开更多
基金National Natural Science Foundation of China(NSFC)(61571060)Ministry of Science and Technology of the People’s Republic of China(MOST)(2016YFA0301300)
文摘We designed a low-filling-factor and polarization-sensitive superconducting nanowire single photon detector(SNSPD), which can achieve a high absorption efficiency and counting rate simultaneously. Numerical simulations show that high absorption efficiency can be achieved by low-filling-factor SNSPDs with a silicon slot and silver reflector. The absorptance of the NbN nanowire for a transverse magnetic(TM) wave at the wavelength of 1550 nm can be 84.4% when the filling factor is only 16.5%, and the corresponding polarization extinction ratio(PER) is 562.9;the absorptance of the NbN nanowire for a transverse electric(TE) wave can be 67.0% when the filling factor is only 11.7%, and the PER is 7.4.
基金support from the National Natural Science Foundation of China(Grant Nos.62131002 and 62071448)and the Fundamental Research Funds for the Central Universities(BNU).
文摘Recently,the photon–magnon coherent interaction based on the collective spins excitation in ferromagnetic materials has been achieved experimentally.Under the prospect,the magnons are proposed to store and process quantum information.Meanwhile,cavity-optomagnonics which describes the interaction between photons and magnons has been developing rapidly as an interesting topic of the cavity quantum electrodynamics.Here in this short review,we mainly introduce the recent theoretical and experimental progress in the field of optomagnetic coupling and optical manipulation based on cavity-optomagnonics.According to the frequency range of the electromagnetic field,cavity optomagnonics can be divided into microwave cavity optomagnonics and optical cavity optomagnonics,due to the different dynamics of the photon–magnon interaction.As the interaction between the electromagnetic field and the magnetic materials is enhanced in the cavity-optomagnonic system,it provides great significance to explore the nonlinear characteristics and quantum properties for different magnetic systems.More importantly,the electromagnetic response of optomagnonics covers the frequency range from gigahertz to terahertz which provides a broad frequency platform for the multi-mode controlling in quantum systems.
