1D and 2D arrays of coupled photonic crystal cavities with a site-controlled quantum wire light source

Abstract

We investigated experimentally 1D and 2D arrays of coupled L3 photonic crystal cavities. The optical modes of the coupled cavity arrays are fed by a site-controlled quantum wire light source. By performing photoluminescence measurements and relying on near-field calculation of the cavitiy modes, we evidence optical coupling between the cavities as well as supermode delocalization. In particular, for small cavity separations, fabrication induced disorder effects are shown to be negligible compared to optical coupling between cavities.

Analysis of a triple-cavity photonic molecule based on coupled-mode theory

“…The predicted transmission spectrum looks nearly identical to the experimental results obtained in the intracavity EIT with cold atoms (Fig. 2 of Ref [40]): the 20 upper/lower mode frequencies locate at 30.83  MHz and the linewidth of the central mode is 2 c  =1.34 MHz. As for the cavity #1 which is directly coupled to the waveguide, the central peak is narrowed more than 10 times.…”

“…Very recently, we have constructed a fully controllable TCPM platform with two types of coupling configurations (see Fig.1 (c)) [25]. Interesting transmission spectra due to supermode evolutions and dark states have been experimentally demonstrated, and certain spectral properties, including the relative phases between the cavities of the TCPMs, have been explained [6,20,23] using CMT [16,17]. However, large amount of physics behind the supermode evolutions are still not explored in such tunable TCPM system, like whether there is a phase transition (or the so called exceptional point [26]) like in DCPM, how degree of coherence [27] between the fields in different cavities 3 changes with different coupling strengths and how energy flows between the cavities.…”

Complex quantum networks as structured environments: engineering and probing

“…As biological systems are very difficult to test in the laboratories, it is highly desirable to develop ways to simulate their dynamics in a controllable way. Possible experimental implementations of the model considered here include optical modes in cavities 32 , ions in segmented traps 33 , mechanical resonator arrays 34 , and cluster states created from an ultrafast frequency comb 35 . While implementing an arbitrary oscillator network is still beyond the reach of experimentalists, simple networks have been implemented with all three platforms and the realization of more complex networks is under active research.…”

Realization of controllable photonic molecule based on three ultrahigh‐Q microtoroid cavities

“…When one of the passive microcavities in DCPM is replaced by an active one (doped with gain medium), an interesting non‐Hermitian optical system is formed, showing parity‐time symmetry and exceptional point, as well as nonreciprocal light transmission . Triple‐cavity PMs (TCPMs) have also been fabricated in microring , microdisk and photonic crystal cavities, having quality factors ranging from 10 3 to 10 5 . These TCPM structures were used to demonstrate mode coupling , analogy to EIT , high‐order optical filters , spectral engineering and PM lasers .…”

“…Triple‐cavity PMs (TCPMs) have also been fabricated in microring , microdisk and photonic crystal cavities, having quality factors ranging from 10 3 to 10 5 . These TCPM structures were used to demonstrate mode coupling , analogy to EIT , high‐order optical filters , spectral engineering and PM lasers . In those previous demonstrations, the used TCPM structures were all as‐fabricated ones, i.e.…”