Abstract
AbstractHybrid light‐matter states, known as polaritons, are the result of strong coupling between light and matter. The formation of polaritons yields a new method to tune the energetics of molecular systems, thus enabling the modification of physical and chemical properties without the need for chemical synthesis. To date, only proof‐of‐principle studies have been demonstrated, and, to increase the relevance of earlier achievements, bridging the gap between quantum electrodynamic length scales and chemical synthesis length scales is necessary. In the present study, we show that the coupling strength of the light‐matter interaction is independent of the thickness of the Fabry‐Pérot cavity used, and that the energy dissipation rate falls with increasing cavity thickness. Using planar microcavities of different thicknesses, we have shown that the size of the cavities can be upscaled without reducing the strength of the strong interaction between light and matter. This can be done up to a length scale commonly used in flow chemistry, thus paving the way for a new optofluidic method that may help to overcome challenges in organic chemistry.
Highlights
Strong light-ma er interaction o ers the possibility to modify chemical and physical properties of molecules by modifying their photonic environment, resulting in the creation of hybrid light-ma er states, known as polaritons. e eld of polaritonic chemistry using micro uidic cavities is in its infancy, and developing methods to increase the coupling strength are necessary to maximise the e ects of polaritonic states
Using FT-IR spectroscopy and numerical modeling, an increase of 50% of the coupling strength is reported by aligning the molecular transition dipole moment inside a cavity
This thesis shows that upscaling micro uidic cavities is possible without a ecting the coupling strength
Summary
Strong light-ma er interaction o ers the possibility to modify chemical and physical properties of molecules by modifying their photonic environment, resulting in the creation of hybrid light-ma er states, known as polaritons. e eld of polaritonic chemistry using micro uidic cavities is in its infancy, and developing methods to increase the coupling strength are necessary to maximise the e ects of polaritonic states. Institutionen för kemi och molekylärbiologi Naturvetenskapliga fakulteten 2020 Akademisk avhandling ör filosofie doktorsexamen i kemi, som med tillstånd från Naturvetenskapliga fakulteten kommer a offentligt örsvaras fredagen den 9 oktober 2020 kl.
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