Tuning whispering gallery modes using internal aerostatic pressure

被引：147

作者：

Henze, Rico ^{[1
]}

Seifert, Tom ^{[1
]}

Ward, Jonathan ^{[1
,2
]}

Benson, Oliver ^{[1
]}

机构：

[1] Univ Berlin, Nanoopt Grp, Dept Phys, D-12489 Berlin, Germany

[2] Univ Coll Cork, Dept Phys, Cork, Ireland

来源：

OPTICS LETTERS | 2011年 / 36卷 / 23期

关键词：

D O I：

10.1364/OL.36.004536

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Aerostatic tuning of whispering gallery modes (WGMs) in a microbubble resonator is demonstrated. The optical modes are redshifted over hundreds of gigahertz (GHz) simply by increasing the air pressure (up to 6 bars) inside the microbubble. A description of the pressure tuning properties of the WGMs in microbubbles is given in terms of the corresponding elasto-optical equations of spherical shells and the results are compared to experimental data. Microbubbles as small as 74 mu m are tested and the experimental results show excellent agreement with the theory. An estimation method is developed for calculating the wall thicknesses of the microbubbles from the diameters, which are measured via direct microscopy. A geometrical factor chi is defined and a linear relationship between the shift rate (GHz/bar) of the bubbles modes and. is observed. (C) 2011 Optical Society of America

引用

页码：4536 / 4538

页数：3

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