Polymeric photonic molecule super-mode lasers on silicon

Tobias Grossmann; Tobias Wienhold; Uwe Bog; Torsten Beck; Christian Friedmann; Heinz Kalt; Timo Mappes

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Polymeric photonic molecule super-mode lasers on silicon

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Optically coupled microcavities have emerged as photonic structures with promising properties for investigation of fundamental science as well as for applications.We 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 substrate.We 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 environments.By 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 achieved.This enables strong optical coupling at visible wavelengths despite relatively small resonator radii of 25 μm.The lasing properties of dye-doped PMs are investigated using spatially resolved micro-photoluminescence(μ-PL)spectroscopy.This technique allows for the direct imaging of whispering-gallery modes(WGMs)in the photonics molecules.For 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 investigated.We further demonstrate single-mode lasing operation in aqueous environments with PMs,which are realized on a low-cost,polymer-on-silicon platform.

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《光：科学与应用（英文版）》 |2013年第1期|150-153|共4页
作者
Tobias Grossmann; Tobias Wienhold; Uwe Bog; Torsten Beck; Christian Friedmann; Heinz Kalt; Timo Mappes;
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作者单位

Institute of Applied Physics and DFG Center for Functional Nanostructures CFN;

Karlsruhe Institute of Technology;

76128 Karlsruhe;

Germany;

Institute of Microstructure Technology;

Karlsruhe Institute of Technology;

76128 Karlsruhe;

Germany;

Institute of Functional Interfaces;

Karlsruhe Institute of Technology;

76128 Karlsruhe;

Germany;

Carl Zeiss AG;

Corporate Research and Technology;

07745 Jena;

Germany;

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原文格式 PDF
正文语种 chi
中图分类光电子技术、激光技术;
关键词
microcavity lasers; photonic molecules; visible lasers; whispering-gallery modes;

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4. Synthesis of Electron-donating Small Molecules and Polymers for Organic Solar Cells [A] . Fateh Ullah . 2017

Polymeric photonic molecule super-mode lasers on silicon

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