3D ring resonator prepared by laser lithography embedded in PDMS

Gaso, Peter; Jandura, Daniel; Pudiš, Dušan; Lettrichova, Ivana

doi:10.1117/12.2265559

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Indeed, if suspended structuresboth the waveguide and the ring resonator held by pedestalsare employed, they are highly unstable and difficult to align. Moreover, the mutual distance between waveguide and ring for the optimal coupling, critical parameters and sensitive to fabrication fluctuations, is shown to be hard to control also during the development process since electrostatic forces can make the structures collapse together . Even the use of solvent drying into a critical point dryer does not solve this issue .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the mutual distance between waveguide and ring for the optimal coupling, critical parameters and sensitive to fabrication fluctuations, 47 is shown to be hard to control also during the development process since electrostatic forces can make the structures collapse together. 48 Even the use of solvent drying into a critical point dryer does not solve this issue. 19 In the proposed geometry, the cavity and the waveguide lay in different planes, determining an oscillating effective coupling as a function of vertical gap with alternating under-and over-coupling regions, separated by several critical coupling points.…”

Section: Acs Photonicsmentioning

confidence: 99%

See 1 more Smart Citation

Three-Dimensional Photonic Circuits in Rigid and Soft Polymers Tunable by Light

Nocentini¹,

Riboli

Burresi³

et al. 2018

ACS Photonics

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Polymeric matrices offer a wide and powerful platform for integrated photonics, complementary to the well-established silicon photonics technology. The possibility to integrate, on the same chip, different customized materials allows for many functionalities, like the ability to dynamically control the spectral properties of single optical components. Within this context, this Article reports on the fabrication and optical characterization of integrated photonic circuits for the telecom C-band, made of a combination of both rigid and tunable elastic polymers. By using a 3D photolithographic technique (direct laser writing), in a single-step process, every building block of the polymeric circuit is fabricated: straight and bent waveguides, grating couplers, and single and vertically coupled whispering gallery mode resonators designed in planar and vertical geometries. Using this platform, a new type of operation was introduced through true three-dimensional integration of tunable photonic components, made by liquid crystalline networks that can be actuated and controlled by a remote and non-invasive light stimulus. Depending on the architecture, it is possible to integrate them as elastic actuators or as constituents of the photonic cavity itself. The two strategies then exploit the optical induced deformation and variation of its refractive index, inducing a net red or blue shift of the cavity resonances, respectively. This work paves the way for light-tunable optical networks that combine different photonic components, made by glassy or shape-changing materials, in order to implement further photonic circuit requirements.

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Section: Resultsmentioning

confidence: 99%

Section: Acs Photonicsmentioning

confidence: 99%