In order to significantly improve the absorption efficiency of monolayer molybdenum disulfide(M-MoS_(2)), an ultranarrowband M-MoS_(2)metamaterial absorber was obtained through theoretical analysis and numerical calcu...In order to significantly improve the absorption efficiency of monolayer molybdenum disulfide(M-MoS_(2)), an ultranarrowband M-MoS_(2)metamaterial absorber was obtained through theoretical analysis and numerical calculation using the finite difference time domain method. The physical mechanism can be better analyzed through critical coupling and guided mode resonance. Its absorption rate at λ = 806.41 nm is as high as 99.8%, which is more than 12 times that of bare MMoS_(2). From the simulation results, adjusting the geometric parameters of the structure can control the resonant wavelength range of the M-MoS_(2). In addition, we also found that the maximum quality factor is 1256.8. The numerical result shows that the design provides new possibilities for ultra-narrowband M-MoS_(2) perfect absorbers in the near-infrared spectrum.The results of this work indicate that the designed structure has excellent prospects for application in wavelength-selective photoluminescence and photodetection.展开更多
Stress is a major risk factor for the development of mental illness,such as major depression disorder (MDD)[1].Despite decades of progress,including findings that stressinduced depression corresponds with numerous mor...Stress is a major risk factor for the development of mental illness,such as major depression disorder (MDD)[1].Despite decades of progress,including findings that stressinduced depression corresponds with numerous morphological and functional neuronal changes within brain structures associated with cognition and mood,such as the medial prefrontal cortex (mPFC)[1-3],a thorough understanding of how stress induces the core symptoms of depression,such as hopelessness,is still lacking.In an exciting new paper in mice,Yin et al.show that astrocyteneuronal metabolic coupling in the mPFC is critically involved in the stress-induced passive coping response in mice [4].展开更多
Ⅰ In October 2002, Alfred Stingl, the mayor of Graz, Austria (social party, retired in 2003), invited the 14th Dalai Lama to preside over what is known as Kalachakra initiation. For a time, some political dignitaries...Ⅰ In October 2002, Alfred Stingl, the mayor of Graz, Austria (social party, retired in 2003), invited the 14th Dalai Lama to preside over what is known as Kalachakra initiation. For a time, some political dignitaries of Austria defied the protests by China all came on the scene. The governor of the State of Styria and mayor of Graz went in person to greet and fete him. The federal education and culture minister and state secretary for economic affairs all went to Graz to witness the activities by Dalai. Austrian foreign minister also took time out to make a special tour to meet him. The University of Graz went so far as to present Dalai with an honorary certificate. Austrian media all展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11604311, 61705204, and 21506257)the Scientific Research Fund of Si Chuan Provincial Science and Technology Department, China (Grant Nos. 2020YJ0137 and 2020YFG0467)+1 种基金the National Defense Science and Technology Innovation Special Zone Project of China (Grant No. 19-163-21-TS-001-067-01)the College Students’s Innovation and Entrepreneurship Training Program (Grant No. S202110619065)。
文摘In order to significantly improve the absorption efficiency of monolayer molybdenum disulfide(M-MoS_(2)), an ultranarrowband M-MoS_(2)metamaterial absorber was obtained through theoretical analysis and numerical calculation using the finite difference time domain method. The physical mechanism can be better analyzed through critical coupling and guided mode resonance. Its absorption rate at λ = 806.41 nm is as high as 99.8%, which is more than 12 times that of bare MMoS_(2). From the simulation results, adjusting the geometric parameters of the structure can control the resonant wavelength range of the M-MoS_(2). In addition, we also found that the maximum quality factor is 1256.8. The numerical result shows that the design provides new possibilities for ultra-narrowband M-MoS_(2) perfect absorbers in the near-infrared spectrum.The results of this work indicate that the designed structure has excellent prospects for application in wavelength-selective photoluminescence and photodetection.
文摘Stress is a major risk factor for the development of mental illness,such as major depression disorder (MDD)[1].Despite decades of progress,including findings that stressinduced depression corresponds with numerous morphological and functional neuronal changes within brain structures associated with cognition and mood,such as the medial prefrontal cortex (mPFC)[1-3],a thorough understanding of how stress induces the core symptoms of depression,such as hopelessness,is still lacking.In an exciting new paper in mice,Yin et al.show that astrocyteneuronal metabolic coupling in the mPFC is critically involved in the stress-induced passive coping response in mice [4].
文摘Ⅰ In October 2002, Alfred Stingl, the mayor of Graz, Austria (social party, retired in 2003), invited the 14th Dalai Lama to preside over what is known as Kalachakra initiation. For a time, some political dignitaries of Austria defied the protests by China all came on the scene. The governor of the State of Styria and mayor of Graz went in person to greet and fete him. The federal education and culture minister and state secretary for economic affairs all went to Graz to witness the activities by Dalai. Austrian foreign minister also took time out to make a special tour to meet him. The University of Graz went so far as to present Dalai with an honorary certificate. Austrian media all
