In this paper,we propose an effective method to compensate for the performance degradation of optically addressed spatial light modulators(OASLMs).The thermal deposition problem usually leads to the on-off ratio reduc...In this paper,we propose an effective method to compensate for the performance degradation of optically addressed spatial light modulators(OASLMs).The thermal deposition problem usually leads to the on-off ratio reduction of amplitude OASLM,so it is difficult to achieve better results in high-power laser systems.Through the analysis of the laser-induced temperature rise model and the liquid crystal layer voltage model,it is found that reducing the driving voltage of the liquid crystal light valve and increasing the driving current of the optical writing module can compensate for the decrease of on-off ratio caused by temperature rise.This is the result of effectively utilizing the photoconductive effect of Bi_(12)SiO_(20)(BSO)crystal.The experimental results verify the feasibility of the proposed method and increase the laser withstand power of amplitude-only OASLM by about a factor of 2.5.展开更多
In this paper,the feasibility of a high laser damage threshold liquid crystal spatial light modulator based on gallium nitride(GaN)transparent conductive electrodes is proved.The laser-induced damage threshold(LIDT)is...In this paper,the feasibility of a high laser damage threshold liquid crystal spatial light modulator based on gallium nitride(GaN)transparent conductive electrodes is proved.The laser-induced damage threshold(LIDT)is measured,and a high LIDT reflective optically addressed liquid crystal light valve(OALCLV)based on GaN is designed and fabricated.The proper work mode of the OALCLV is determined;the OALCLV obtained a maximum reflectivity of about 55%and an on–off ratio of 55:1,and an image response is demonstrated.展开更多
Large-scale trapped-ion quantum computers hold great promise to outperform classical computers and are crucially desirable for fnance,pharmaceutical industry,fundamental chemistry and other felds.Currently,a big chall...Large-scale trapped-ion quantum computers hold great promise to outperform classical computers and are crucially desirable for fnance,pharmaceutical industry,fundamental chemistry and other felds.Currently,a big challenge for trapped-ion quantum computers is the poor scalability mainly brought by the optical elements that are used for optical addressing.Metasurfaces provide a promising solution due to their excellent fexibility and integration ability.Here,we propose and numerically demonstrate a scalable of-axis metalens array for optical addressing working at the wavelength of 350 nm.Metalens arrays designed for x linearly polarized and left circularly polarized light respectively can focus the collimated addressing beam array into a compact focused spot array with spot spacing of 5μm,featuring crosstalk below 0.82%.展开更多
基金supported by the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA25020303)the financial support of the Self Deployed Projects of Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences.
文摘In this paper,we propose an effective method to compensate for the performance degradation of optically addressed spatial light modulators(OASLMs).The thermal deposition problem usually leads to the on-off ratio reduction of amplitude OASLM,so it is difficult to achieve better results in high-power laser systems.Through the analysis of the laser-induced temperature rise model and the liquid crystal layer voltage model,it is found that reducing the driving voltage of the liquid crystal light valve and increasing the driving current of the optical writing module can compensate for the decrease of on-off ratio caused by temperature rise.This is the result of effectively utilizing the photoconductive effect of Bi_(12)SiO_(20)(BSO)crystal.The experimental results verify the feasibility of the proposed method and increase the laser withstand power of amplitude-only OASLM by about a factor of 2.5.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA25020303)。
文摘In this paper,the feasibility of a high laser damage threshold liquid crystal spatial light modulator based on gallium nitride(GaN)transparent conductive electrodes is proved.The laser-induced damage threshold(LIDT)is measured,and a high LIDT reflective optically addressed liquid crystal light valve(OALCLV)based on GaN is designed and fabricated.The proper work mode of the OALCLV is determined;the OALCLV obtained a maximum reflectivity of about 55%and an on–off ratio of 55:1,and an image response is demonstrated.
基金supported by the National Natural Science Foundation of China(Grant Nos.62075073,62135004,and 62075129)the Fundamental Research Funds for the Central Universities(No.2019kfyXKJC038)+1 种基金State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University(No.2021GZKF007)Key R&D Project of Hubei Province(No.2021BAA003).
文摘Large-scale trapped-ion quantum computers hold great promise to outperform classical computers and are crucially desirable for fnance,pharmaceutical industry,fundamental chemistry and other felds.Currently,a big challenge for trapped-ion quantum computers is the poor scalability mainly brought by the optical elements that are used for optical addressing.Metasurfaces provide a promising solution due to their excellent fexibility and integration ability.Here,we propose and numerically demonstrate a scalable of-axis metalens array for optical addressing working at the wavelength of 350 nm.Metalens arrays designed for x linearly polarized and left circularly polarized light respectively can focus the collimated addressing beam array into a compact focused spot array with spot spacing of 5μm,featuring crosstalk below 0.82%.
