Bragg grating cavities embedded into nano-photonic waveguides for Purcell enhanced quantum dot emission

Hepp, Stefan; Bauer, Stephanie; Hornung, Florian; Schwartz, Mario; Portalupi, Simone Luca; Jetter, Michael; Michler, Peter

doi:10.1364/oe.26.030614

Cited by 17 publications

(15 citation statements)

References 41 publications

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“…This translates into the absence of Purcell‐enhancement and a maximum β ‐factor in the 10% range (per direction) limiting the source brightness and generation of Fourier‐limited photons . To circumvent this problem, it was demonstrated recently, that Bragg grating cavities as seen in Figure e can be integrated directly into ridge waveguide structures dramatically increasing the light–matter interaction with a theoretical Purcell enhancement factor of 20 and a simultaneous high directional coupling efficiency of

β_{dir}

=70% (

β_{dir}

considers only the spontaneous emission rate into one of the counter‐propagating waveguide modes) . Experimental Q‐factors around 4500 were shown for waveguide‐integrated cavities with a lifetime reduction of integrated QDs up to a factor of

F_{P} = 3.5 \pm 0.5

.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

“…Thus, an on‐chip filter mechanism for the excitation laser is nearly indispensable, as the laser photons are scattered through the substrate or couple into the waveguide, reducing the signal‐to‐noise ratio at the SNSPDs or even dominating the signal. For this purpose, several filter designs are available, depending on the chosen waveguide geometry (Bragg gratings, microrings, PhC cavities), where the bandwidth can be chosen accordingly to the experimental needs. Furthermore, QDs show complex emission spectra for above‐bandgap excitation demanding the use of strict resonant pumping schemes which can further interfere with the implementation of an on‐chip filter mechanism.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

“…A further optimization of the stray light covers in combination with an integrated cavity as recently demonstrated in ref. [] could dramatically improve the device performance by both, increasing the QD‐WG coupling and detector efficiency if used as a mirror behind the detectors. This experiment demonstrated that the implementation of photon sources, photonic logic, and detectors on the same chip is feasible representing a major step toward fully integrated quantum optical circuits on larger scales.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

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Semiconductor Quantum Dots for Integrated Quantum Photonics

et al. 2019

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Quantum mechanics promises to have a strong impact on many aspects of research and technology, improving classical analogues via purely quantum effects. A large variety of tasks are currently under investigation, for example, the implementation of quantum computing, sensing, metrology, and communication. From a general perspective, in a similar way as classical computing benefited by the reduction of the device footprint, enabling the realization of highly complex chips, a range of quantum applications will sensibly improve thanks to the successful realization of on-chip quantum photonics. Conversely to bulky table-top experiments, it would be very advantageous to transfer all required functionalities on the same quantum photonic chip. The key elements for quantum photonic circuits are on-demand nonclassical light sources, a versatile photonic logic, the ability to store quantum information, and highly efficient detectors, directly integrated on-chip. Among several systems capable of the efficient generation of singleand indistinguishable photons, quantum dots are rapidly establishing as one of the most appealing candidates. This paper reviews the recent progress in the on-chip integration of quantum-dot-based nonclassical light sources as well as in the development of the main building blocks, either integrated monolithically or hybridly on a compact and scalable platform. IntroductionFrom the foundation of quantum mechanics in the early 20th century to explain fundamental physical observations, over the development of transistors and lasers in the 1950s and 1960s, the second quantum revolution is now in full swing. The driving force behind this continuing "quantum footrace" are quantum mechanical effects based on superposition and entanglement that can lead to profound changes. Especially in the field of quantum information science, dramatic improvements are expected in terms of increased computational speed and communication security if compared with classical counterparts.Talking about quantum supremacy, two problems-Grover's algorithm for the efficient search in large unsorted databases and Shor's algorithm for the prime factorization of large integers-are frequently mentioned. [1][2][3] Grover's quantum search algorithm can find an element of a search space M in O( √ M) operations compared to the best known classical algorithms approximately requiring O(M) steps. [4] Shor's algorithm can prime factorize large integers with N bits in polynomial speed compared to the exponential scaling of classical algorithms. Currently, several cryptography schemes in electronic communication systems rely on the difficulty of prime factorization as its security method. Consequently, a quantum computer could break the cryptographic keys quickly by calculating or searching exhaustively all key possibilities, which may allow an eavesdropper to intercept the communication channel. [5] However, quantum key distribution schemes can be alternatively used, which are based on the secure exchange of a cryptographic key between remote...

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β_{dir}

=70% (

β_{dir}

F_{P} = 3.5 \pm 0.5

.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

See 2 more Smart Citations

Semiconductor Quantum Dots for Integrated Quantum Photonics

et al. 2019

Self Cite

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show abstract

“…Resonators (or cavities) with different structural configurations undergo a potential role in generating a better light-matter interaction in the MIM-cavity waveguide system [38][39][40]. Recently, several MIM waveguide with different shape of cavities has been proposed and investigated for the plasmonic sensor, such as rectangular/circular ring cavity [41], tooth-shaped cavity [42], trapezoid cavity [43], ring cavity with metal baffles [44], asymmetric double elliptic cylinders [45], Bragg grating cavity [46], fillet cavity [47], metallic nanorods in hexagonal configuration [48], stub coupled with a square cavity [49] and so forth.…”

Section: Introductionmentioning

confidence: 99%

Multiple-Mode Bowtie Cavities for Refractive Index and Glucose Sensors Working in Visible and Near-Infrared Wavelength Range

Chau

2021

Preprint

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A multiple-mode metal-insulator-metal plasmonic sensor with four coupled bowtie resonators containing two pair of silver baffles is numerically investigated using the finite element method and verified by the temporal coupled-mode theory. The proposed structure can function as the plasmonic refractive index and glucose sensors working in visible and near-infrared wavelength range. Simulation results show that introducing the silver baffles in bowtie cavities can modify the plasmon resonance modes and give a tunable way to enhance the sensitivity and figure of merit. The highest sensitivity (S) can reach S=1500.00, 1400.00, and 1100.00 nm/RIU and the high figure of merit (FOM) of 50.00, 46.67, and 36.67 RIU-1 from mode 1 to mode 3. The sensitivity obtained from three modes with operating wavelengths in visible and near-infrared simultaneously exceeds 1100.00 nm/RIU along with remarkably high FOM, which are not attainable from other reported literature. The proposed structure can realize multi-mode and shows impressive practical prospects that can be applied for integrated optics circuits (IOCs) and other nanophotonics devices.

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Visible Laser on Silicon Optofluidic Microcavity

Omran

Sameh

Mahfouz

et al. 2020

Adv Materials Technologies

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Optical readout within microfluidic chips is a bottleneck limiting their industrial development. The integration of lasers operating in the visible range within a microfluidic platform is crucial for enabling in situ optical measurements in lab‐on‐a‐chip applications. In principle, microstructured single‐crystal silicon is an excellent optofluidic platform, which allows integration of microfluidic channels together with optical circuits including micro‐optics, waveguides, and resonant cavities. However, the silicon absorption below 1.1 µm is a fundamental limit that prohibits the use of silicon‐based microcavities as the feedback element for visible lasers and restricts their use to the infrared only. In this work, an ultra‐wide band silicon cavity enabled by two deeply etched hollow‐core planar waveguides is demonstrated. The proposed microcavity shows a broad bandwidth extending from 500 to 1600 nm with quality factors up to 2067. A tubular microfluidic channel is inserted between the mirrors of the optofluidic cavity. The microfluidic channel is filled with Rhodamine 6G (R6G) at 20 µL min−1 flow rate allowing successful demonstration of lasing on silicon at 562.4 nm. The laser beam propagates in‐plane (along the chip surface) and is handled with monolithically integrated input/output optical fiber grooves. This provides a unique silicon platform integrating hollow core optofluidic channels together with optical cavities, which is suitable for implementing optical readout in lab‐on‐a‐chip devices.

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Bragg grating cavities embedded into nano-photonic waveguides for Purcell enhanced quantum dot emission

Cited by 17 publications

References 41 publications

Semiconductor Quantum Dots for Integrated Quantum Photonics

Semiconductor Quantum Dots for Integrated Quantum Photonics

Multiple-Mode Bowtie Cavities for Refractive Index and Glucose Sensors Working in Visible and Near-Infrared Wavelength Range

Visible Laser on Silicon Optofluidic Microcavity

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