This paper presents a photonic crystal(PhC)line-defect slow-light waveguide modified by resonant rings.We introduce resonant rings into the line defect,constructing a slow-light waveguide with high normalized delay ba...This paper presents a photonic crystal(PhC)line-defect slow-light waveguide modified by resonant rings.We introduce resonant rings into the line defect,constructing a slow-light waveguide with high normalized delay bandwidth product(NDBP)and low group velocity dispersion(GVD).We simulate,analyze,and optimize the structural parameters of this slow-light waveguide using the finite difference time domain(FDTD)method,theoretically achieving a maximum group index of 3.7,maximum bandwidth of 15.6 nm,and maximum NDBP of 0.4416 for slow-light effect.The resonant ring-modified PhC slow-light waveguide designed in this paper exhibits GVD lower than the order of 10^(−20)s^(2)/m over a normalized frequency range from 0.3554 to 0.4175.This study is expected to provide theoretical references for the study of slow-light buffering devices based on PhCs with high NDBP values.展开更多
广义Voronoi图(GVD)的生成可以分为直接法和近似法.利用VDC(Van Der Corput)采样序列,结合了近似法,设计了一种基于VDC采样序列的GVD生成算法.该算法改进了一般生成GVD的近似方法,使得点集的采样可以增量进行,并且精度可控,提高了现有GV...广义Voronoi图(GVD)的生成可以分为直接法和近似法.利用VDC(Van Der Corput)采样序列,结合了近似法,设计了一种基于VDC采样序列的GVD生成算法.该算法改进了一般生成GVD的近似方法,使得点集的采样可以增量进行,并且精度可控,提高了现有GVD生成算法的性能.展开更多
原发性纵隔大B细胞淋巴瘤(primary mediastinal large B-cell lymphoma,PMBCL)是弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)的一种特殊亚型,好发于年轻女性[1-2]。PMBCL是一种罕见的癌症,目前对复发/难治性PMBCL的治疗...原发性纵隔大B细胞淋巴瘤(primary mediastinal large B-cell lymphoma,PMBCL)是弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)的一种特殊亚型,好发于年轻女性[1-2]。PMBCL是一种罕见的癌症,目前对复发/难治性PMBCL的治疗一般与其他复发/难治性DLBCL治疗相同,治疗方案主要包括:R-DA-EPOCH(利妥昔单抗+依托泊苷+泼尼松+长春新碱+环磷酰胺+阿霉素),DHAP(地塞米松+阿糖胞苷+顺铂),ESHAP(依托泊苷+甲基强的松+阿糖胞苷+铂剂),GDP(吉西他滨+地塞米松+顺铂),以及mini-beam(卡莫司汀+依托泊苷+阿糖胞苷+马法兰)[3-4]。展开更多
基金supported by the Graduate Student Innovation Fund of Xi’an Shiyou University(No.YCS21211087).
文摘This paper presents a photonic crystal(PhC)line-defect slow-light waveguide modified by resonant rings.We introduce resonant rings into the line defect,constructing a slow-light waveguide with high normalized delay bandwidth product(NDBP)and low group velocity dispersion(GVD).We simulate,analyze,and optimize the structural parameters of this slow-light waveguide using the finite difference time domain(FDTD)method,theoretically achieving a maximum group index of 3.7,maximum bandwidth of 15.6 nm,and maximum NDBP of 0.4416 for slow-light effect.The resonant ring-modified PhC slow-light waveguide designed in this paper exhibits GVD lower than the order of 10^(−20)s^(2)/m over a normalized frequency range from 0.3554 to 0.4175.This study is expected to provide theoretical references for the study of slow-light buffering devices based on PhCs with high NDBP values.
文摘原发性纵隔大B细胞淋巴瘤(primary mediastinal large B-cell lymphoma,PMBCL)是弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)的一种特殊亚型,好发于年轻女性[1-2]。PMBCL是一种罕见的癌症,目前对复发/难治性PMBCL的治疗一般与其他复发/难治性DLBCL治疗相同,治疗方案主要包括:R-DA-EPOCH(利妥昔单抗+依托泊苷+泼尼松+长春新碱+环磷酰胺+阿霉素),DHAP(地塞米松+阿糖胞苷+顺铂),ESHAP(依托泊苷+甲基强的松+阿糖胞苷+铂剂),GDP(吉西他滨+地塞米松+顺铂),以及mini-beam(卡莫司汀+依托泊苷+阿糖胞苷+马法兰)[3-4]。
