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photonic molecules with a tunable inter-cavity gap

Light(Science & Applications) 2016年第1期5卷 195-201页

作者： Tobias Siegle Stefan Schierle Sarah Kraemmer Benjamin Richter Sentayehu F Wondimu Peter Schuch Christian Koos Heinz Kalt Institute of Applied Physics Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Zoological Institute Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Institute of Microstructure Technology Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Institute of photonics and Quantum Electronics Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany

Optical micro-resonators have broad *** are used,for example,to enhance light–matter interactions in optical sensors or as model systems for investigating fundamental physical mechanisms in cavity quantum *** two or more micro-cavities is particularly interesting as it enlarges the design freedom and the field of *** 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 *** 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 *** structure goblet-shaped whispering-gallery-mode resonators on an elastic silicone-based polymer substrate by direct laser *** silicone substrate is mechanically stretched in order to exploit the lateral shrinkage to reduce the coupling *** a laser dye into the micro-resonators transforms the cavities into micro-lasers that can be pumped *** have investigated the lasing emission by micro-photoluminescence spectroscopy,focusing on the spatial localization of the *** results demonstrate the formation of photonic molecules consisting of two or even three resonators,for which the coupling strengths and hence the lasing performance can be precisely *** and tunability are key elements in future photonics,making our approach interesting for various photonic *** instance,as our coupling approach can also be extended to larger cavity arrays,it might serve as a platform for tunable coupled-resonator optical waveguide devices.

关键词： coupled resonators photonic molecules micro-lasers tunable coupling gap whispering gallery mode resonators

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Polymeric photonic molecule super-mode lasers on silicon

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Light(Science & Applications) 2013年第1期2卷 150-153页

作者： Tobias Grossmann Tobias Wienhold Uwe Bog Torsten Beck Christian Friedmann Heinz Kalt Timo Mappes Institute of Applied Physics and DFG Center for Functional Nanostructures CFN Karlsruhe Institute of Technology76128 KarlsruheGermany Institute of Microstructure Technology Karlsruhe Institute of Technology76128 KarlsruheGermany Institute of Functional Interfaces Karlsruhe Institute of Technology76128 KarlsruheGermany Carl Zeiss AG Corporate Research and Technology07745 JenaGermany

Optically coupled microcavities have emerged as photonic structures with promising properties for investigation of fundamental science as well as for *** report on the fabrication and spatially resolved spectroscopy of on-chip photonic molecule(PM)lasers consisting of two coupled,dye-doped polymeric microdisks on a silicon *** investigate the fundamental lasing properties with focus on the spatial distribution of modes,the coupling dependent suppression of lasing modes,and in particular the application-oriented operation of these devices in aqueous *** depositing an additional polymer layer onto the lithographically structured cavities made of dye-doped poly(methyl methacrylate),coupling-gap widths below 150 nm with aspect ratios of the micro-/nanostructure exceeding 9:1 are *** enables strong optical coupling at visible wavelengths despite relatively small resonator radii of 25 μ*** lasing properties of dye-doped PMs are investigated using spatially resolved micro-photoluminescence(μ-PL)*** technique allows for the direct imaging of whispering-gallery modes(WGMs)in the photonics *** subwavelength coupling gaps,we observe lasing from delocalized eigenstates of the PMs(termed in the following as super-modes).Using size-mismatched cavities,the lasing mode suppression for different coupling-gap widths is *** further demonstrate single-mode lasing operation in aqueous environments with PMs,which are realized on a low-cost,polymer-on-silicon platform.

关键词： microcavity lasers photonic molecules visible lasers whispering-gallery modes

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