激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
2期
205-209
,共5页
陈浩毅%刘军辉%李了艳%黄明举
陳浩毅%劉軍輝%李瞭豔%黃明舉
진호의%류군휘%리료염%황명거
非线性光学%三光子吸收截面%光限幅%芴类衍生物
非線性光學%三光子吸收截麵%光限幅%芴類衍生物
비선성광학%삼광자흡수절면%광한폭%물류연생물
nonlinear optics%three-photon absorption section%optical limiting%fluorine-based derivatives
为了研究分子结构对三光子吸收的影响,合成了两种新型芴类衍生物,分别是2,7-二(2-4(甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(A)和2-溴-7-(2-(4-甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(B),采用1064nm的Nd∶YAG激光器测试其三光子吸收截面的方法,得到了它们的三光子吸收截面分别高达(6.03±0.6)×10-76 cm6· s2/photon2和(4.25±0.4)×10-76 cm6· s2/photon2的结果,在高斯03软件下,用密度泛函方法对这两个分子进行了结构优化,并用含时密度泛函理论计算了它们的激发态能量和电子轨道。结果表明,分子内电荷转移方向对三光子吸收存在影响。
為瞭研究分子結構對三光子吸收的影響,閤成瞭兩種新型芴類衍生物,分彆是2,7-二(2-4(甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(A)和2-溴-7-(2-(4-甲氧基苯基)乙炔基)-9,9-二辛基-9H-芴(B),採用1064nm的Nd∶YAG激光器測試其三光子吸收截麵的方法,得到瞭它們的三光子吸收截麵分彆高達(6.03±0.6)×10-76 cm6· s2/photon2和(4.25±0.4)×10-76 cm6· s2/photon2的結果,在高斯03軟件下,用密度汎函方法對這兩箇分子進行瞭結構優化,併用含時密度汎函理論計算瞭它們的激髮態能量和電子軌道。結果錶明,分子內電荷轉移方嚮對三光子吸收存在影響。
위료연구분자결구대삼광자흡수적영향,합성료량충신형물류연생물,분별시2,7-이(2-4(갑양기분기)을결기)-9,9-이신기-9H-물(A)화2-추-7-(2-(4-갑양기분기)을결기)-9,9-이신기-9H-물(B),채용1064nm적Nd∶YAG격광기측시기삼광자흡수절면적방법,득도료타문적삼광자흡수절면분별고체(6.03±0.6)×10-76 cm6· s2/photon2화(4.25±0.4)×10-76 cm6· s2/photon2적결과,재고사03연건하,용밀도범함방법대저량개분자진행료결구우화,병용함시밀도범함이론계산료타문적격발태능량화전자궤도。결과표명,분자내전하전이방향대삼광자흡수존재영향。
In order to study effect of molecular structure on three-photon absorption(3PA) characteristics, two novel fluorene-based derivatives:2, 7-bis(2-(4-methoxyphenyl)ethynyl)-9,9-dioctyl-9H-fluorene(A) and 2-bromo-7-(2-(4-methoxyphenyl)ethynyl)-9,9-dioctyl-9H-fluorene(B) were synthesized.The 3PA cross-sections of both the compounds were tested by using a Q-switched Nd∶YAG laser at 1064nm.The 3PA cross-sections were obtained , i.e., (6.03 ±0.6) × 10-76 cm6 · s2/photon2 and (4.25 ±0.4) ×10 -76 cm6 · s2/photon2 respectively.The geometries in the ground states and electronic structures of both the compounds were investigated by density functional theory methods and time -dependent density functional theory methods of Gaussian 03, and the impact on the three-photon absorption characteristics was analyzed.