可調控性是隨機雷射邁向實際應用的一個關鍵。在本論文中，我們成功展示了磁控隨機雷射。我們使用了無毒的Stilbene 420 雷射染料和二氧化鈦與四氧化三鐵的奈米粒子組成磁控隨機雷射。磁控隨機雷射具有良好的磁場可調控和切換性，並且在長時間的測試下亦有良好的穩定性。磁場可操控四氧化三鐵磁性奈米粒子在系統中的分布，這改變了形成雷射的封閉迴圈，進而得到可調控的雷射。此工作可視為發展潛在磁控光學裝置的原型，如生物醫學和光學通信。

Towards practical applications of random lasers, controllability is a key factor. Herein, magnetically controllable random lasers (MCRLs) are demonstrated. Under prescribed magnetic field, the MCRLs composed of all nontoxic materials, including stilbene 420 laser dye, TiO2 nanoparticles, and Fe3O4 nanoparticles, possess magnetic controllability and switchability with good responsivity and durability. The distribution of Fe3O4 nanoparticles can be manipulated by an applied magnetic field, which in turn alters the formation of the coherent loops and the properties of laser action. The MCRLs developed here can serve as magneto-optics prototypes for several potential applications, such as biomedicine and optical communications.

中文摘要 I
Abstract II
Contents III
List of Figures V
Figure of chapter2 V
Figure of chapter3 V
Figure of chapter4 VI
Chapter1 Introduction 1
Reference 5
Chapter 2 Theoretical Background 9
2.1 Band Gap Structure 9
2.2 Photoluminescence (PL) 12
2.3 Random Laser (RL) 14
2.3.1 Emission properties 16
2.3.2 Tunability 19
2.3.3 Application 23
(1) Highly stable optical frequency standard 23
(2) Medical field 24
(3) Identification 25
2.4 Closed loop path 26
Reference 27
Chapter 3 Experimental Details 29
3.1 Scanning Electron Microscopy (SEM) 29
3.2 Random Laser Measurement 31
Reference 32
Chapter 4 Magnetically Controllable Random Lasers 33
4.1 Introduction 33
4.2 Experimental Section 34
4.3 Result and Discussions 35
4.4 Conclusion 42
Reference 50
Chapter 5 Conclusion 53

Chapter 1
[1]N. M. Lawandy, R. Balachandran, A. Gomes, E. Sauvain, Nature 1994, 368, 436.
[2]R. Polson, A. Chipouline, Z. V. Vardeny, Adv. Mater. 2001, 13, 760.
[3]R. Chen, B. Utama, M. Iqbal, Z. Peng, B. Peng, Q. Xiong, H. Sun, Adv. Mater. 2011, 23, 1404.
[4]X. Meng, K. Fujita, Y. Moriguchi, Y. Zong, K. Tanaka, Adv. Opt. Mater. 2013, 1, 573.
[5]X. Shi, Y. Wang, Z. Wang, S. Wei, Y. Sun, D. Liu, J. Zhou, Y. Zhang, J. Shi, Adv. Opt. Mater. 2014, 2, 88.
[6]J. Fallert, R. J. Dietz, J. Sartor, D. Schneider, C. Klingshirn, H. Kalt, Nat. Photonics 2009, 3, 279.
[7]D. Wiersma, Nature 2000, 406, 132.
[8]Y. M. Liao, Y. C. Lai, P. Perumal, W. C. Liao, C. Y. Chang, C. S. Liao, S. Y. Lin, Y. F. Chen, Adv. Mater. Tech. 2016, 1.
[9]S. P. Lau, H. Yang, S. F. Yu, C. Yuen, E. S. Leong, H. Li, H. H. Hng, Small 2005, 1, 956.
[10]H. Cao, Y. Zhao, S. Ho, E. Seelig, Q. Wang, R. Chang, Phys. Rev. Lett. 1999, 82, 2278.
[11]B. Redding, M. A. Choma, H. Cao, Nat. Photonics 2012, 6, 355.
[12]Q. Song, S. Xiao, Z. Xu, V. M. Shalaev, Y. L. Kim, Opt. Lett. 2010, 35, 2624.
[13]D. S. Wiersma, Nat. Phys. 2008, 4, 359.
[14]F. Luan, B. Gu, A. S. Gomes, K.-T. Yong, S. Wen, P. N. Prasad, Nano Today 2015, 10, 168.
[15]E. S. Leong, S. F. Yu, Adv. Mater. 2006, 18, 1685.
[16]J. Huang, S. Chu, J. Kong, L. Zhang, C. M. Schwarz, G. Wang, L. Chernyak, Z. Chen, J. Liu, Adv. Opt. Mater. 2013, 1, 179.
[17]H. Zhu, C. X. Shan, J. Y. Zhang, Z. Z. Zhang, B. H. Li, D. X. Zhao, B. Yao, D. Z. Shen, X. W. Fan, Z. K. Tang, Adv. Mater. 2010, 22, 1877.
[18]T. Zhai, Z. Xu, S. Li, X. Zhang, Opt. Express 2017, 25, 2100.
[19]H. Zhu, C. X. Shan, B. Yao, B. H. Li, J. Y. Zhang, Z. Z. Zhang, D. X. Zhao, D. Z. Shen, X. W. Fan, Y. M. Lu, Adv. Mater. 2009, 21, 1613.
[20]T. Nakamura, B. P. Tiwari, S. Adachi, Appl. Phys. Lett. 2011, 99, 231105.
[21]R. G. El-Dardiry, A. Lagendijk, Appl. Phys. Lett. 2011, 98, 161106.
[22]S. Gottardo, R. Sapienza, P. D. Garcia, A. Blanco, D. S. Wiersma, C. López, Nat. Photonics 2008, 2, 429.
[23]J. Liu, P. Garcia, S. Ek, N. Gregersen, T. Suhr, M. Schubert, J. Mørk, S. Stobbe, P. Lodahl, Nat. Nanotechnol. 2014, 9, 285.
[24]M. Leonetti, C. López, Appl. Phys. Lett. 2013, 102, 071105.
[25]Q. Song, L. Liu, L. Xu, Y. Wu, Z. Wang, Opt. Lett. 2009, 34, 298.
[26]D. S. Wiersma, S. Cavalieri, Nature 2001, 414, 708.
[27]S. Mujumdar, S. Cavalieri, D. S. Wiersma, J. Opt. Soc. Am. B 2004, 21, 201.
[28]Q. Song, S. Xiao, X. Zhou, L. Liu, L. Xu, Y. Wu, Z. Wang, Opt. Lett. 2007, 32, 373.
[29]T.-M. Sun, C.-S. Wang, C.-S. Liao, S.-Y. Lin, P. Perumal, C.-W. Chiang, Y.-F. Chen, ACS Nano 2015, 9, 12436.
[30]M. Leonetti, C. Conti, C. Lopez, Nat. Photonics 2011, 5, 615.
[31]E. Shojaie, A. Mirzaei, A. Bahrampour, Opt. Lett. 2014, 39, 4537.
[32]H. Fujiwara, R. Niyuki, Y. Ishikawa, N. Koshizaki, T. Tsuji, K. Sasaki, Appl. Phys. Lett. 2013, 102, 061110.
[33]C.-S. Wang, T.-Y. Chang, T.-Y. Lin, Y.-F. Chen, Sci. Rep. 2014, 4, 6736.
[34]T. Zhai, Y. Zhou, S. Chen, Z. Wang, J. Shi, D. Liu, X. Zhang, Phys. Rev. A 2010, 82, 023824.
[35]H. Cao, J. Xu, S.-H. Chang, S. Ho, Phys. Rev. E 2000, 61, 1985.
[36]Z. Wang, X. Shi, S. Wei, Y. Sun, Y. Wang, J. Zhou, J. Shi, D. Liu, Laser Phys Lett. 2014, 11, 095002.
[37]L. Sznitko, K. Cyprych, A. Szukalski, A. Miniewicz, J. Mysliwiec, Laser Phys Lett. 2014, 11, 045801.
[38]Q. Song, L. Liu, S. Xiao, X. Zhou, W. Wang, L. Xu, Phys. Rev. Lett. 2006, 96, 033902.
[39]H. Liang, S. Yu, H. Yang, Appl. Phys. Lett. 2010, 96, 101116.
[40]T. Zhai, X. Zhang, Z. Pang, X. Su, H. Liu, S. Feng, L. Wang, Nano Lett. 2011, 11, 4295.
[41]T. Hisch, M. Liertzer, D. Pogany, F. Mintert, S. Rotter, Phys. Rev. Lett. 2013, 111, 023902.
[42]G. Dice, S. Mujumdar, A. Elezzabi, Appl. Phys. Lett. 2005, 86, 131105.
[43]J. Kitur, G. Zhu, M. Bahoura, M. Noginov, J. Opt. 2010, 12, 024009.
[44]W. Sha, C.-H. Liu, R. Alfano, Opt. Lett. 1994, 19, 1922.
[45]C. Wang, Y. Chen, H. Lin, Y. Chen, Y. Chen, Appl. Phys. Lett. 2010, 97, 191104.
[46]O. Popov, A. Zilbershtein, D. Davidov, Appl. Phys. Lett. 2006, 89, 191116.
[47]X. Meng, K. Fujita, Y. Zong, S. Murai, K. Tanaka, Appl. Phys. Lett. 2008, 92, 201112.

Chapter 2
[1]M. Fujita, Nat. Photonics 2013, 7, 264.
[2]C. de Mello Donega, Chem. Soc. Rev. 2011, 40, 1512.
[3]F. Luan, B. Gu, A. S. Gomes, K.-T. Yong, S. Wen, P. N. Prasad, Nano Today 2015, 10, 168.
[4]Z. Wang, X. Shi, S. Wei, Y. Sun, Y. Wang, J. Zhou, J. Shi, D. Liu, Laser Phys Lett. 2014, 11, 095002.
[5]H. Cao, Y. Zhao, S. Ho, E. Seelig, Q. Wang, R. Chang, Phys. Rev. Lett. 1999, 82, 2278.
[6]D. S. Wiersma, S. Cavalieri, Nature 2001, 414, 708.
[7]C.-R. Lee, S.-H. Lin, J.-W. Guo, J.-D. Lin, H.-L. Lin, Y.-C. Zheng, C.-L. Ma, C.-T. Horng, H.-Y. Sun, S.-Y. Huang, Optical Materials Express 2015, 5, 1469.
[8]S. Gottardo, S. Cavalieri, O. Yaroshchuk, D. S. Wiersma, Phys. Rev. Lett. 2004, 93, 263901.
[9]T. Zhai, J. Chen, L. Chen, J. Wang, L. Wang, D. Liu, S. Li, H. Liu, X. Zhang, Nanoscale 2015, 7, 2235.
[10]T.-M. Sun, C.-S. Wang, C.-S. Liao, S.-Y. Lin, P. Perumal, C.-W. Chiang, Y.-F. Chen, ACS Nano 2015, 9, 12436.
[11]V. Letokhov, ZhETF Pisma Redaktsiiu 1967, 5, 262.
[12]F. Auzel, P. Goldner, J. Alloys Compd. 2000, 300, 11.
[13]R. Balachandran, D. Pacheco, N. Lawandy, Appl. Opt. 1996, 35, 640.
[14]C. Gouedard, D. Husson, C. Sauteret, F. Auzel, A. Migus, J. Opt. Soc. Am. B 1993, 10, 2358.
[15]R. C. Polson, Z. V. Vardeny, Appl. Phys. Lett. 2004, 85, 1289.
[16]D. Wiersma, Nature 2000, 406, 132.
[17]N. M. Lawandy, Photonics Spectra 1994, 28, 119.
[18]Y. M. Liao, Y. C. Lai, P. Perumal, W. C. Liao, C. Y. Chang, C. S. Liao, S. Y. Lin, Y. F. Chen, Adv. Mater. Tech. 2016, 1.
[19]D. Zhang, Y. Wang, D. Ma, Appl. Phys. Lett. 2007, 91, 091115.
[20]Y. Chen, C. Chen, H. Lin, C. Chen, Y. Chen, Y. Hung, C. Mou, Opt. Express 2009, 17, 12706.

chapter 3
[1] Schroder, D. K., Semiconductor Material and Device Characterization, Wiley (1998).

chapter 4
[1]S. Babin, A. El-Taher, P. Harper, E. Podivilov, S. Turitsyn, Phys. Rev. A 2011, 84, 021805.
[2]Y. M. Liao, Y. C. Lai, P. Perumal, W. C. Liao, C. Y. Chang, C. S. Liao, S. Y. Lin, Y. F. Chen, Adv. Mater. Tech. 2016, 1.
[3]S. Takeda, M. Obara, Appl. Phys. B: Lasers Opt. 2010, 98, 267.
[4]Q. Song, L. Liu, L. Xu, Y. Wu, Z. Wang, Opt. Lett. 2009, 34, 298.
[5]C. M. Courtney, S. M. Goodman, J. A. McDaniel, N. E. Madinger, A. Chatterjee, P. Nagpal, Nat. Mater. 2016, 15, 529.
[6]Q. A. Pankhurst, J. Connolly, S. K. Jones, J. Dobson, J. Phys. D: Appl. Phys. 2003, 36, R167.
[7]J.-H. Lee, Y.-M. Huh, Y.-w. Jun, J.-w. Seo, J.-t. Jang, H.-T. Song, S. Kim, E.-J. Cho, H.-G. Yoon, J.-S. Suh, Nat. Med. 2007, 13, 95.
[8]A. Smuk, E. Lazaro, L. P. Olson, N. Lawandy, Opt. Commun. 2011, 284, 1257.
[9]H. Telle, U. Brinkmann, R. Raue, Opt. Commun. 1978, 24, 33.
[10]L. Sznitko, K. Cyprych, A. Szukalski, A. Miniewicz, J. Mysliwiec, Laser Phys Lett. 2014, 11, 045801.
[11]H. El Ghandoor, H. Zidan, M. M. Khalil, M. Ismail, Int. J. Electrochem. Sci 2012, 7, 5734.
[12]K. Thamaphat, P. Limsuwan, B. Ngotawornchai, Nat. Sci. 2008, 42, 357.
[13]J. Andruszkow, B. Aune, V. Ayvazyan, N. Baboi, R. Bakker, V. Balakin, D. Barni, A. Bazhan, M. Bernard, A. Bosotti, Phys. Rev. Lett. 2000, 85, 3825.
[14]K.-J. Kim, Phys. Rev. Lett. 1986, 57, 1871.
[15]X. Wu, H. Cao, Phys. Rev. A 2008, 77, 013832.
[16]D. S. Wiersma, Nat. Phys. 2008, 4, 359.
[17]N. M. Lawandy, R. Balachandran, A. Gomes, E. Sauvain, Nature 1994, 368, 436.
[18]H. Cao, Y. Zhao, S. Ho, E. Seelig, Q. Wang, R. Chang, Phys. Rev. Lett. 1999, 82, 2278.
[19]H. Cao, J. Xu, D. Zhang, S.-H. Chang, S. Ho, E. Seelig, X. Liu, R. Chang, Phys. Rev. Lett. 2000, 84, 5584.
[20]B. Redding, M. A. Choma, H. Cao, Nat. Photonics 2012, 6, 355.
[21]M. Leonetti, C. Conti, C. Lopez, Nat. Photonics 2011, 5, 615.
[22]C. Grivas, C. Li, P. Andreakou, P. Wang, M. Ding, G. Brambilla, L. Manna, P. Lagoudakis, Nat. Commun. 2013, 4.
[23]H. Xu, J. B. Wright, A. Hurtado, Q. Li, T.-S. Luk, J. J. Figiel, K. Cross, G. Balakrishnan, L. F. Lester, I. Brener, Appl. Phys. Lett. 2012, 101, 221114.
[24]M. Bahoura, K. Morris, M. Noginov, Opt. Commun. 2002, 201, 405.
[25]F. Luan, B. Gu, A. S. Gomes, K.-T. Yong, S. Wen, P. N. Prasad, Nano Today 2015, 10, 168.
[26]F. Krausz, T. Brabec, Opt. Lett. 1993, 18, 888.
[27]D. Zhang, Y. Wang, D. Ma, Appl. Phys. Lett. 2007, 91, 091115.
[28]Y. Chen, C. Chen, H. Lin, C. Chen, Y. Chen, Y. Hung, C. Mou, Opt. Express 2009, 17, 12706.
[29]T.-M. Sun, C.-S. Wang, C.-S. Liao, S.-Y. Lin, P. Perumal, C.-W. Chiang, Y.-F. Chen, ACS Nano 2015, 9, 12436.
[30]D. S. Wiersma, S. Cavalieri, Nature 2001, 414, 708.