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- W2498232105 abstract "Photonic microcavities (PMC) coupled through their evanescent field are used for a large variety of classical andquantum devices. In such systems, a molecular-like spatial delocalization of the coupled modes is achieved by an evanescent tunnelling. The tunnelling rate depends on the height and depth of the photonic barrier between twoadjacent resonators and therefore it is sensitive to the fabrication-induced disorder present in the center of themolecule. In this contribution, we address the problem of developing a post fabrication control of the tunnelling rate in photonic crystal coupled PMCs. The value of the photonic coupling (proportional to the tunnelling rate) is directly measured by the molecular mode splitting at the anticrossing point. By exploiting a combination of tuning techniques such as local infiltration of water, micro-evaporation, and laser induced non thermal micro-oxidation, we are able to either increase or decrease the detuning and the photonic coupling, independently. Near field imaging is also used for mapping the modes and establish delocalization.By water micro-infiltration, we were able to increase the photon coupling by 28%. On the contrary, bylaser induced non thermal oxidation, we got a reduction of g by 30%. The combination of the two methods would therefore give a complete control of g with excellent accuracy. This could make possible the realization of array of photonic cavities with on demand tunnelling rate between each pair of coupled resonators. We believe that this peculiar engineering of photonic crystal molecules would open the road to possible progress in the exploitation of coherent interference between coupled optical resonators both for quantum information processing and optical communication." @default.
- W2498232105 created "2016-08-23" @default.
- W2498232105 creator A5022039383 @default.
- W2498232105 date "2016-07-26" @default.
- W2498232105 modified "2023-09-27" @default.
- W2498232105 title "Imaging and tuning of coupled photonic crystal cavities (Conference Presentation)" @default.
- W2498232105 doi "https://doi.org/10.1117/12.2225628" @default.
- W2498232105 hasPublicationYear "2016" @default.
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