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研究了激发态质子转移(ESPT)分子2-(2'-羟基苯基)苯并噻唑(HBT)在不同极性溶剂中的光开关行为,探讨了溶剂极性对HBT分子光开光效应的影响.揭示了光开关脉冲信号的形成原因,建立了基于光诱导HBT分子激发态非线性折射效应的皮秒全光开关的理论模型.根据对时间响应函数的理论计算和实验结果分析,确定了光开关脉冲信号下降前沿和上升后沿的形成机理以及影响因素,并提出了增强光开关信号下降前沿的关断深度,提升上升后沿的恢复速度的有效途径和方法.本文工作为制成皮秒量级关断,微秒甚至纳秒量级重新打开的快速全光开关器
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关键词:
- 全光开关 /
- 2-(2'-羟基苯基)苯并噻唑(HBT) /
- 激发态质子转移 /
- 非线性光学特性
An all-optical switching model system comprising a single pulsed pump beam at 355 nm and a cw He-Ne signal beam at 632.8 nm was demonstrated with 2-(2'-hydroxyphenyl) benzothiazole(HBT) in five different polar solvents. The origin of the optical switching effect was discussed, and it was verified that fast excited state intramolecular proton transfer (ESIPT) of HBT and the slow thermal effect of solvent together induced the change of the refractive index of HBT solutions, which lead to the signal beam deflection and dominated the optical switching "off" and "on" states, respectively. The slow thermal effect of solvent results in the "tail" phenomenon of the optical switching recovery, and reducing the signal beam waist radius is a viable means for accelerating the recovery of the optical switching. The results indicated that the HBT molecule could be an excellent candidate for high-speed and high-sensitivity optical switching devices. This work provides a theoretical as well as experimental basis for the production of ultra-fast all-optical switching device.-
Keywords:
- all-optical switching /
- 2-(2'-hydroxyphenyl)benzothiazole (HBT) /
- excited state proton transfer (ESPT) /
- optical nonlinearity
[1] Li Z H, Xue Y L, Deng Z Q, Shen T G 2009 Optik 120 605
[2] Roy S, Sharma P, Dharmadhikari A K, Mathur D 2004 Opt. Commun. 237 251
[3] Nishizawa N, Ukai Y, Goto T 2005 Opt. Express 13 8128
[4] Rodriguez E, Kellermann G, Craievich A F, Jimenez E, César C L, Barbosa L C 2008 Superlattice Microst. 43 626
[5] Kim Y, Kim N, Chung Y, Paek U C, Han W T 2004 Opt. Express 12 651
[6] Janke C, Gómez Rivas J, Haring Bolivar P, Kurz H 2005 Opt. Lett. 30 2357
[7] Zheng J J, Guo Y X, Li X P, Zhang G L, Chen W J 2006 J. Opt. A: Pure Appl. Op. 8 835
[8] Zheng J J, Zhang G L, Guo Y X, Li X P, Chen W J 2007 Chinese Phy. 16 1047
[9] Zheng J J, Zhang G L, Wu F, Ma L N, Chen W J 2008 Spectrosc. Spect. Anal. 28 970 (in Chinese) [郑加金、张桂兰、吴 峰、马丽娜、陈文驹 2008 光谱学与光谱分析28 970]
[10] Aquino A J A, Plasser F, Barbatti M, Lischka H 2009 Croat. Chem. Acta 82 105
[11] Basaric N, Wan P 2006 Photochem. Photobiol. 5 656
[12] Mondal S K, Ghosh S, Sahu K, Sen P, Bhattacharyya K 2007 J. Chem. Sci. 119 71
[13] Rini M, Dreyer J, Nibbering E T J, Elsaesser T 2003 Chem. Phys. Lett. 374 13
[14] Costela A, Garcia-Moreno I 1996 Chem. Phys. Lett. 249 373
[15] Santran S, Martinez-Rosas M, Canioni L, Sarger L, Glebova L N, Tirpak A, Glebov L B 2006 Opt. Mater. 28 401
[16] Shao Y Q, Guo Q 2006 Acta Phys. Sin. 55 2751(in Chinese)[邵毅全、郭 旗2006 55 2751]
[17] Sheik-Bahae M, Said A A, Wei T H, Hagan D J, Van Stryland E W 1990 IEEE J. Quantum Elect. 26 760
[18] Strobl K, Golub I 1992 IEEE J. Quantum Elect. 28 1435
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[1] Li Z H, Xue Y L, Deng Z Q, Shen T G 2009 Optik 120 605
[2] Roy S, Sharma P, Dharmadhikari A K, Mathur D 2004 Opt. Commun. 237 251
[3] Nishizawa N, Ukai Y, Goto T 2005 Opt. Express 13 8128
[4] Rodriguez E, Kellermann G, Craievich A F, Jimenez E, César C L, Barbosa L C 2008 Superlattice Microst. 43 626
[5] Kim Y, Kim N, Chung Y, Paek U C, Han W T 2004 Opt. Express 12 651
[6] Janke C, Gómez Rivas J, Haring Bolivar P, Kurz H 2005 Opt. Lett. 30 2357
[7] Zheng J J, Guo Y X, Li X P, Zhang G L, Chen W J 2006 J. Opt. A: Pure Appl. Op. 8 835
[8] Zheng J J, Zhang G L, Guo Y X, Li X P, Chen W J 2007 Chinese Phy. 16 1047
[9] Zheng J J, Zhang G L, Wu F, Ma L N, Chen W J 2008 Spectrosc. Spect. Anal. 28 970 (in Chinese) [郑加金、张桂兰、吴 峰、马丽娜、陈文驹 2008 光谱学与光谱分析28 970]
[10] Aquino A J A, Plasser F, Barbatti M, Lischka H 2009 Croat. Chem. Acta 82 105
[11] Basaric N, Wan P 2006 Photochem. Photobiol. 5 656
[12] Mondal S K, Ghosh S, Sahu K, Sen P, Bhattacharyya K 2007 J. Chem. Sci. 119 71
[13] Rini M, Dreyer J, Nibbering E T J, Elsaesser T 2003 Chem. Phys. Lett. 374 13
[14] Costela A, Garcia-Moreno I 1996 Chem. Phys. Lett. 249 373
[15] Santran S, Martinez-Rosas M, Canioni L, Sarger L, Glebova L N, Tirpak A, Glebov L B 2006 Opt. Mater. 28 401
[16] Shao Y Q, Guo Q 2006 Acta Phys. Sin. 55 2751(in Chinese)[邵毅全、郭 旗2006 55 2751]
[17] Sheik-Bahae M, Said A A, Wei T H, Hagan D J, Van Stryland E W 1990 IEEE J. Quantum Elect. 26 760
[18] Strobl K, Golub I 1992 IEEE J. Quantum Elect. 28 1435
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