随着在美国被称为"金州杀手"("golden state killer")的连环奸杀案嫌疑人落网,法医系谱学研究作为一种新型的侦查技术手段受到广泛关注.该技术被美国Science杂志评选为2018年十大科学突破之一.2018年4月, 72岁的美...随着在美国被称为"金州杀手"("golden state killer")的连环奸杀案嫌疑人落网,法医系谱学研究作为一种新型的侦查技术手段受到广泛关注.该技术被美国Science杂志评选为2018年十大科学突破之一.2018年4月, 72岁的美国加州前警察约瑟夫·迪安杰洛(Joseph James DeAngelo)被指控在1974~1986年期间犯下约50起强奸案和12起谋杀案,时隔30多年,警方终于将这个连环杀手缉拿归案(https://www.nytimes.com/2018/04/25/us/golden-state-killer-serial.html).展开更多
A quasi-phase-matched technique is introduced for soliton transmission in a quadratic[χ^((2))]nonlinear crystal to realize the stable transmission of dipole solitons in a one-dimensional space under three-wave mixing...A quasi-phase-matched technique is introduced for soliton transmission in a quadratic[χ^((2))]nonlinear crystal to realize the stable transmission of dipole solitons in a one-dimensional space under three-wave mixing.We report four types of solitons as dipole solitons with distances between their bimodal peaks that can be laid out in different stripes.We study three cases of these solitons:spaced three stripes apart,one stripe apart,and confined to the same stripe.For the case of three stripes apart,all four types have stable results,but for the case of one stripe apart,stable solutions can only be found atω_(1)=ω_(2),and for the condition of dipole solitons confined to one stripe,stable solutions exist only for Type1 and Type3 atω_(1)=ω_(2).The stability of the soliton solution is solved and verified using the imaginary time propagation method and real-time transfer propagation,and soliton solutions are shown to exist in the multistability case.In addition,the relations of the transportation characteristics of the dipole soliton and the modulation parameters are numerically investigated.Finally,possible approaches for the experimental realization of the solitons are outlined.展开更多
文摘随着在美国被称为"金州杀手"("golden state killer")的连环奸杀案嫌疑人落网,法医系谱学研究作为一种新型的侦查技术手段受到广泛关注.该技术被美国Science杂志评选为2018年十大科学突破之一.2018年4月, 72岁的美国加州前警察约瑟夫·迪安杰洛(Joseph James DeAngelo)被指控在1974~1986年期间犯下约50起强奸案和12起谋杀案,时隔30多年,警方终于将这个连环杀手缉拿归案(https://www.nytimes.com/2018/04/25/us/golden-state-killer-serial.html).
基金supported by the National Natural Science Foundation of China(Grant Nos.12274077 and 11874112)the Research Fund of the Guangdong Hong Kong Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology(Grant No.2020B1212030010)the Graduate Innovative Talents Training Program of Foshan University.
文摘A quasi-phase-matched technique is introduced for soliton transmission in a quadratic[χ^((2))]nonlinear crystal to realize the stable transmission of dipole solitons in a one-dimensional space under three-wave mixing.We report four types of solitons as dipole solitons with distances between their bimodal peaks that can be laid out in different stripes.We study three cases of these solitons:spaced three stripes apart,one stripe apart,and confined to the same stripe.For the case of three stripes apart,all four types have stable results,but for the case of one stripe apart,stable solutions can only be found atω_(1)=ω_(2),and for the condition of dipole solitons confined to one stripe,stable solutions exist only for Type1 and Type3 atω_(1)=ω_(2).The stability of the soliton solution is solved and verified using the imaginary time propagation method and real-time transfer propagation,and soliton solutions are shown to exist in the multistability case.In addition,the relations of the transportation characteristics of the dipole soliton and the modulation parameters are numerically investigated.Finally,possible approaches for the experimental realization of the solitons are outlined.
