[
    {
        "id": "authors:647rw-v5242",
        "collection": "authors",
        "collection_id": "647rw-v5242",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230605-255128000.2",
        "type": "monograph",
        "title": "Many-body cavity quantum electrodynamics with driven inhomogeneous emitters",
        "author": [
            {
                "family_name": "Lei",
                "given_name": "Mi",
                "clpid": "Lei-Mi"
            },
            {
                "family_name": "Fukumori",
                "given_name": "Rikuto",
                "orcid": "0000-0003-0896-4261",
                "clpid": "Fukumori-Rikuto"
            },
            {
                "family_name": "Rochman",
                "given_name": "Jake",
                "clpid": "Rochman-Jake-H"
            },
            {
                "family_name": "Zhu",
                "given_name": "Bihui",
                "orcid": "0000-0002-9457-4560",
                "clpid": "Zhu-Bihui"
            },
            {
                "family_name": "Endres",
                "given_name": "Manuel",
                "orcid": "0000-0002-4461-224X",
                "clpid": "Endres-M"
            },
            {
                "family_name": "Choi",
                "given_name": "Joonhee",
                "orcid": "0000-0002-3507-8751",
                "clpid": "Choi-Joonhee"
            },
            {
                "family_name": "Faraon",
                "given_name": "Andrei",
                "orcid": "0000-0002-8141-391X",
                "clpid": "Faraon-A"
            }
        ],
        "abstract": "Quantum emitters coupled to optical resonators are quintessential systems for exploring fundamental phenomena in cavity quantum electrodynamics (cQED) and are commonly used in quantum devices acting as qubits, memories and transducers. Many previous experimental cQED studies have focused on regimes in which a small number of identical emitters interact with a weak external drive, such that the system can be described with simple, effective models. However, the dynamics of a disordered, many-body quantum system subject to a strong drive have not been fully explored, despite its importance and potential in quantum applications. Here we study how a large, inhomogeneously broadened ensemble of solid-state emitters coupled with high cooperativity to a nanophotonic resonator behaves under strong excitation. We discover a sharp, collectively induced transparency (CIT) in the cavity reflection spectrum, resulting from quantum interference and collective response induced by the interplay between driven inhomogeneous emitters and cavity photons. Furthermore, coherent excitation within the CIT window leads to highly nonlinear optical emission, spanning from fast superradiance to slow subradiance. These phenomena in the many-body cQED regime enable new mechanisms for achieving slow light and frequency referencing, pave a way towards solid-state superradiant lasers and inform the development of ensemble-based quantum interconnects.",
        "publisher": "arXiv",
        "publication_date": "2022-08-08"
    },
    {
        "id": "authors:rr6hk-jdr78",
        "collection": "authors",
        "collection_id": "rr6hk-jdr78",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210825-184701434",
        "type": "monograph",
        "title": "Constraining continuous topology optimizations to discrete solutions for photonic applications",
        "author": [
            {
                "family_name": "Ballew",
                "given_name": "Conner",
                "orcid": "0000-0003-4854-8342",
                "clpid": "Ballew-Conner"
            },
            {
                "family_name": "Roberts",
                "given_name": "Gregory",
                "clpid": "Roberts-Gregory-D"
            },
            {
                "family_name": "Zheng",
                "given_name": "Tianzhe",
                "orcid": "0000-0001-7058-5196",
                "clpid": "Zheng-Tianzhe"
            },
            {
                "family_name": "Faraon",
                "given_name": "Andrei",
                "orcid": "0000-0002-8141-391X",
                "clpid": "Faraon-A"
            }
        ],
        "abstract": "Photonic topology optimization is a technique used to find the electric permittivity distribution of a device that optimizes an electromagnetic figure-of-merit. Two common techniques are used: continuous density-based optimizations that optimize a grey-scale permittivity defined over a grid, and discrete level-set optimizations that optimize the shape of the material boundary of a device. More recently, continuous optimizations have been used to find an initial seed for a concluding level-set optimization since level-set techniques tend to benefit from a well-performing initial structure. However, continuous optimizations are not guaranteed to yield sufficient initial seeds for subsequent level-set optimizations, particularly for high-contrast structures, since they are not guaranteed to converge to solutions that resemble only two discrete materials. In this work, we present a method for constraining a continuous optimization such that it converges to a discrete solution. This is done by inserting a constrained sub-optimization at each iteration of an overall gradient-based optimization. This technique can be used purely on its own to optimize a device, or it can be used to provide a nearly discrete starting point for a level-set optimization.",
        "doi": "10.48550/arXiv.2107.09468",
        "publisher": "arXiv",
        "publication_date": "2021-07-20"
    }
]