Whispering-Gallery Mode lasers for biosensing: a rationale for reducing the lasing threshold

被引:0
作者
Francois, Alexandre [1 ,2 ]
Riesen, Nicolas [1 ,2 ]
Ji, Hong [1 ,2 ]
Vahid, Shahraam Afshar [1 ,2 ,3 ]
Monro, Tanya M. [1 ,2 ,3 ]
机构
[1] Univ Adelaide, Inst Photon & Adv Sensing, Adelaide, SA 5005, Australia
[2] Univ Adelaide, ARC Ctr Excellence Nanoscale BioPhoton CNBP, Adelaide, SA 5005, Australia
[3] Univ S Australia, Adelaide, SA 5000, Australia
来源
LASER RESONATORS, MICRORESONATORS, AND BEAM CONTROL XVII | 2015年 / 9343卷
关键词
Whispering-gallery modes; microresonators; lasing; EMISSION;
D O I
10.1117/12.2076889
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Whispering-gallery modes have been studied extensively for biosensing applications. Whilst the vast majority of work undertaken has focused on high Q factor resonators, with the main improvement being a reduction of the resonator size to improve sensitivity, we have chosen a different pathway by starting with resonators that exhibit extremely high refractive index sensitivity but low Q factor. A way forward to overcome this limitation is to introduce a gain medium and operate the resonator above its lasing threshold. This has been shown to result on average in a 5 fold increase in the Q factor. With the lasing threshold itself being dependent on the Q factor, amongst other parameters, the Q factor enhancement can be exploited to either reduce the lasing threshold or alternatively enable smaller resonators to be operated above their lasing threshold. As a demonstration we present a 10 mu m diameter polystyrene microsphere lasing in aqueous solution for refractive index sensing applications, which to the best of our knowledge is the smallest polystyrene microsphere laser ever demonstrated in these conditions.
引用
收藏
页数:7
相关论文
共 25 条
[1]   Generic Method of Preparing Multifunctional Fluorescent Nanoparticles Using Flash NanoPrecipitation [J].
Akbulut, Mustafa ;
Ginart, Paul ;
Gindy, Marian E. ;
Theriault, Christian ;
Chin, Katherine H. ;
Soboyejo, Winston ;
Prud'homme, Robert K. .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (05) :718-725
[2]   Shift of whispering-gallery modes in microspheres by protein adsorption [J].
Arnold, S ;
Khoshsima, M ;
Teraoka, I ;
Holler, S ;
Vollmer, F .
OPTICS LETTERS, 2003, 28 (04) :272-274
[3]   Modeling whispering gallery modes in quantum dot embedded polystyrene microspheres [J].
Beier, Hope T. ;
Cote, Gerard L. ;
Meissner, Kenith E. .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2010, 27 (03) :536-543
[4]   A Fiber-Tip Label-Free Biological Sensing Platform: A Practical Approach toward In-Vivo Sensing [J].
Francois, Alexandre ;
Reynolds, Tess ;
Monro, Tanya M. .
SENSORS, 2015, 15 (01) :1168-1181
[5]   Enhancing the radiation efficiency of dye doped whispering gallery mode microresonators [J].
Francois, Alexandre ;
Rowland, Kristopher J. ;
Afshar, Shahraam V. ;
Henderson, Matthew R. ;
Monro, Tanya M. .
OPTICS EXPRESS, 2013, 21 (19) :22566-22577
[6]   Highly efficient excitation and detection of whispering gallery modes in a dye-doped microsphere using a microstructured optical fiber [J].
Francois, Alexandre ;
Rowland, Kristopher J. ;
Monro, Tanya M. .
APPLIED PHYSICS LETTERS, 2011, 99 (14)
[7]   Optical Sensors Based on Whispering Gallery Modes in Fluorescent Microbeads: Size Dependence and Influence of Substrate [J].
Francois, Alexandre ;
Himmelhaus, Michael .
SENSORS, 2009, 9 (09) :6836-6852
[8]   Tunable whispering gallery quantum-dot-doped mode emission from microspheres [J].
Gómez, DE ;
Pastoriza-Santos, I ;
Mulvaney, P .
SMALL, 2005, 1 (02) :238-241
[9]   Near-field gap effects on small microcavity whispering-gallery mode resonators [J].
Guo, Zhixiong ;
Quan, Haiyong ;
Pau, Stanley .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2006, 39 (24) :5133-5136
[10]   Whispering gallery microcavity lasers [J].
He, Lina ;
Oezdemir, Sahin Kaya ;
Yang, Lan .
LASER & PHOTONICS REVIEWS, 2013, 7 (01) :60-82