High-quality-factor microring resonator for strong atom–light interactions using miniature atomic beams

Dorche, Ali Eshaghian; Wei, Bochao; Raman, Chandra; Adibi, Ali

doi:10.1364/ol.404331

Cited by 9 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The employed narrow-linewidth lasers and their respective center wavelengths are: Toptica DL Pro 780 nm for 780 nm; Sacher Lion Series TEC-500-0645-010-M for 644 nm; Cobolt Samba 1500 coupled to a Fiber-Q G&H AOM driven at 170 MHz for 532 nm; Toptica DL Pro HP 488 nm for 488 nm; and Toptica DL Pro HP 461 nm for 461 nm. SiN absorption [this work] SiN [5,16,25,28,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] AlN [11][12][13][14] Al 2 O 3 [15,16] TiO 2 [17,18] LiNbO 3 [10] SiN (b) Highest quality factors, corresponding to the fundamental TE modes of microresonators with 4 µm width. The ring radius is 115 µm for 461 nm, and 300 µm for the other wavelengths.…”

Section: B Experimental Setupmentioning

confidence: 99%

Absorption and scattering limits of integrated photonics in the visible spectrum

Corato-Zanarella¹,

Ji²,

Mohanty³

et al. 2023

Preprint

View full text Add to dashboard Cite

Visible-light photonic integrated circuits (PICs) promise scalability for technologies such as quantum information, biosensing, and scanning displays, yet extending large-scale silicon photonics to shorter wavelengths has been challenging due to the higher losses. Silicon nitride (SiN) has stood out as the leading platform for visible photonics, but the propagation losses strongly dependent on the film's deposition and fabrication processes. Current loss measurement techniques cannot accurately distinguish between absorption and surface scattering, making it difficult to identify the dominant loss source and reach the platform's fundamental limit. Here we demonstrate an ultra-low loss, high-confinement SiN platform that approaches the limits of absorption and scattering across the visible spectrum. Leveraging the sensitivity of microresonators to loss, we probe and discriminate each loss contribution with unparalleled sensitivity, and derive their fundamental limits and scaling laws as a function of wavelength, film properties and waveguide parameters. Through the design of the waveguide cross-section, we show how to approach the absorption limit of the platform, and demonstrate the lowest propagation losses in high-confinement SiN to date across the visible spectrum. We envision that our techniques for loss characterization and minimization will contribute for the development of large-scale PICs that redefine the loss limits of integrated platforms across the electromagnetic spectrum.

show abstract

Section: B Experimental Setupmentioning

confidence: 99%

Absorption and scattering limits of integrated photonics in the visible spectrum

Corato-Zanarella¹,

Ji²,

Mohanty³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Reducing energy dissipation is a crucial method for enhancing the quality factor of resonators. In recent years, the energy dissipation dilution theory has been effectively utilized to enhance the quality factor of silicon nitride resonators [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Whether this theory can be applied to graphene resonators to enhance their quality factor requires further research.…”

Section: Introductionmentioning

confidence: 99%

Research on Fabrication of Phononic Crystal Soft-Supported Graphene Resonator

Zheng,

Liu,

Zhen

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

In aviation, aerospace, and other fields, nanomechanical resonators could offer excellent sensing performance. Among these, graphene resonators, as a new sensitive unit, are expected to offer very high mass and force sensitivity due to their extremely thin thickness. However, at present, the quality factor of graphene resonators at room temperature is generally low, which limits the performance improvement and further application of graphene resonators. Enhancing the quality factor of graphene resonators has emerged as a pressing research concern. In a previous study, we have proposed a new mechanism to reduce the energy dissipation of graphene resonators by utilizing phononic crystal soft-supported structures. We verified its feasibility through theoretical analysis and simulations. This article focuses on the fabrication of a phononic crystal soft-supported graphene resonator. In order to address the issues of easy fracture, deformation, and low success rate in the fabrication of phononic crystal soft-supported graphene resonators, we have studied key processes for graphene suspension release and focused ion beam etching. Through parameter optimization, finally, we have obtained phononic crystal soft-supported graphene resonators with varying cycles and pore sizes. Finally, we designed an optical excitation and detection platform based on Fabry–Pérot interference principle and explored the impact of laser power and spot size on phononic crystal soft-supported graphene resonators.

show abstract

Collimated versatile atomic beam source with alkali dispensers

Wei

Crawford

Andeweg

et al. 2022

Applied Physics Letters

View full text Add to dashboard Cite

Alkali metal dispensers have become an indispensable tool in the production of atomic vapors for magnetometry, alkali vapor cell clocks, and laser cooling experiments. A primary advantage of these dispensers is that they contain alkali metal in an inert form that can be exposed to air without hazard. However, their high temperature of operation (>600 °C) is undesirable for many applications, as it shifts the atomic speed distribution to higher values and presents a radiative heat source that can raise the temperature of its surroundings. For this reason, dispensers are typically not used in line-of-sight applications, such as atomic beam generation. In this work, we present an integrated rubidium dispenser collimating device with a thickness of only 2 mm that produces a beam of atoms traveling primarily in the forward direction. We find that the collimator plate serves to both shield the dispenser's radiation and moderate the velocity of the atomic beam so that the measured longitudinal speed distribution is comparable to that of an ordinary alkali oven at only a slightly elevated temperature of 200 °C. To confirm our theory, we also constructed another compact apparatus consisting of a dispenser and a silicon collimator and the measurements support our conclusion. Our integrated dispenser collimator will particularly be useful in integrated photonics and cavity QED on-chip, where a localized, directed source of Rb vapor in small quantities is needed.

show abstract

High-quality-factor microring resonator for strong atom–light interactions using miniature atomic beams

Cited by 9 publications

References 21 publications

Absorption and scattering limits of integrated photonics in the visible spectrum

Absorption and scattering limits of integrated photonics in the visible spectrum

Research on Fabrication of Phononic Crystal Soft-Supported Graphene Resonator

Collimated versatile atomic beam source with alkali dispensers

Contact Info

Product

Resources

About