Photonic molecules with a tunable inter-cavity gap

Light, Science & Applications
Tobias SiegleHeinz Kalt

Abstract

Optical micro-resonators have broad applications. They are used, for example, to enhance light-matter interactions in optical sensors or as model systems for investigating fundamental physical mechanisms in cavity quantum electrodynamics. Coupling two or more micro-cavities is particularly interesting as it enlarges the design freedom and the field of application. In this context, achieving tunability of the coupling strength and hence the inter-cavity gap is of utmost importance for adjusting the properties of the coupled micro-resonator system. In this paper, we report on a novel coupling approach that allows highly precise tuning of the coupling gap of polymeric micro-resonators that are fabricated side by side on a common substrate. We structure goblet-shaped whispering-gallery-mode resonators on an elastic silicone-based polymer substrate by direct laser writing. The silicone substrate is mechanically stretched in order to exploit the lateral shrinkage to reduce the coupling gap. Incorporating a laser dye into the micro-resonators transforms the cavities into micro-lasers that can be pumped optically. We have investigated the lasing emission by micro-photoluminescence spectroscopy, focusing on the spatial localization of t...Continue Reading

References

Aug 15, 2003·Nature·Kerry J Vahala
Feb 25, 2006·Optics Letters·Joyce K S PoonAmnon Yariv
Aug 12, 2006·Optics Letters·Milos A PopovícHenry I Smith
May 17, 2008·Optics Letters·Lei ShangLei Xu
Jul 1, 2008·Nature Methods·Frank Vollmer, Stephen Arnold
Apr 15, 1995·Optics Letters·M M MazumderJ B Gillespie
Apr 19, 2011·Optics Letters·M BenyoucefO G Schmidt
Jul 1, 2011·Optics Express·Tobias GrossmannHeinz Kalt
Nov 18, 2011·Lab on a Chip·Weiqiang ChenJianping Fu
Nov 24, 2011·Optics Express·Xingwang ZhangLei Xu
Feb 6, 2013·Optics Letters·Bo PengLan Yang

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Citations

Nov 22, 2018·Applied Optics·Lei XiangLiJun Wang
May 8, 2017··Heinz KaltTobias Siegle

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Methods Mentioned

BETA
electron beam lithography
light scattering
chip

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