Group IV mid-infrared photonics

Mashanovich, Goran Z.; Nedeljković, Miloš; Penadés, Jordi Soler; Mitchell, C. J.; Khokhar, Ali Z.; Littlejohns, Callum; Stanković, S.; Troia, Benedetto; Wang, Y.; Reynolds, Scott A.; Passaro, Vittorio M. N.; Shen, Li; Healy, Noel; Peacock, Anna C.; Alonso-Ramos, C.; Ortega‐Moñux, Alejandro; Wangüemert‐Pérez, J. Gonzalo; Molina-Fernández, Í.; Rowe, David J.; Wilkinson, James S.; Cheben, Pavel; Ackert, Jason J.; Knights, A. P.; Thomson, David J.; Gardès, Frédéric

doi:10.1117/12.2176219

Cited by 4 publications

(6 citation statements)

References 27 publications

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“…Furthermore, different wavelength ranges and integrated waveguides can also be explored as demonstrated by the operation of Vernier devices based on SOI rib and strip waveguides at the intriguing MIR wavelength range, where the optical absoprtion can be used with the conventional RI sensing principles, i.e. , the homogeneous and surface sensing [ 29 , 41 , 42 ].…”

Section: Discussionmentioning

confidence: 99%

“…In conclusion, the aforementioned Vernier devices have also been used to demonstrate sensing in the MIR. In fact, perfluorodecalin, which exhibits low absorption around 3.8 µm, has been concentrated on top of the SOI chip by means of a PDMS microfluidic channel and an overall Vernier wavelength shift

≈ 38 nm has resulted due to a cover RI change of

≈ 10−1 RIU [ 42 ]. Actually, the tested Vernier device was not covered by an insulating layer, thus both cascade-coupled RRs were exposed to the same cover medium and shifted analogously.…”

Section: Test Of the Vernier Device Operation And Performancementioning

confidence: 99%

See 1 more Smart Citation

Design Procedure and Fabrication of Reproducible Silicon Vernier Devices for High-Performance Refractive Index Sensing

Troia

Khokhar

Nedeljkovic

et al. 2015

Sensors

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In this paper, we propose a generalized procedure for the design of integrated Vernier devices for high performance chemical and biochemical sensing. In particular, we demonstrate the accurate control of the most critical design and fabrication parameters of silicon-on-insulator cascade-coupled racetrack resonators operating in the second regime of the Vernier effect, around 1.55 μm. The experimental implementation of our design strategies has allowed a rigorous and reliable investigation of the influence of racetrack resonator and directional coupler dimensions as well as of waveguide process variability on the operation of Vernier devices. Figures of merit of our Vernier architectures have been measured experimentally, evidencing a high reproducibility and a very good agreement with the theoretical predictions, as also confirmed by relative errors even lower than 1%. Finally, a Vernier gain as high as 30.3, average insertion loss of 2.1 dB and extinction ratio up to 30 dB have been achieved.

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Section: Discussionmentioning

confidence: 99%

≈ 38 nm has resulted due to a cover RI change of

≈ 10−1 RIU [ 42 ]. Actually, the tested Vernier device was not covered by an insulating layer, thus both cascade-coupled RRs were exposed to the same cover medium and shifted analogously.…”

Section: Test Of the Vernier Device Operation And Performancementioning

confidence: 99%

Design Procedure and Fabrication of Reproducible Silicon Vernier Devices for High-Performance Refractive Index Sensing

Troia

Khokhar

Nedeljkovic

et al. 2015

Sensors

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“…The invited paper by Mashanovich et al presents a comprehensive review of latest progress in mid-IR integrated photonics based on Group IV materials encompassing suspended Si, Ge-on-Si, and suspended Ge [86] In addition to passive components, an impressive array of active devices such as modulators and detectors are also introduced, which constitute essential building blocks towards a fully-integrated mid-IR photonic platform.…”

Section: Integrated Mid-ir Photonicsmentioning

confidence: 99%

Feature issue introduction: mid-infrared optical materials and their device applications

Mawst

Moss

et al. 2018

Opt. Mater. Express

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The mid-infrared (mid-IR, 2 to 10 μm) is a technologically important spectral regime for sensing, imaging, and communications. In the past few years, there has been a surge of interest in novel mid-IR optical materials as well as their device implementations to address the increasing demands from these applications. The 22 papers in this feature issue represent a diverse cross-section of the latest technological advances in this field, spanning mid-IR light generation, propagation, manipulation, and detection functions in free-space, fiber, and planar platforms. In terms of material systems, semiconductors, glasses, plasmonic metals, as well as nanostructures specifically engineered for the mid-IR band, are all extensively covered. We hope that the readers will enjoy the kaleidoscopic view of the burgeoning field of mid-IR optics and photonics through this feature issue.

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“…We have also demonstrated the possibility, with this platform, of precisely controlling the supercontinuum coherence properties [9,10]. Due to their a priori wider transparency windows [11], pure germanium on silicon waveguides are anticipated to overcome the current limits of other group-IV platforms. So far, however, supercontinuum generation in germanium waveguides has been limited to numerical demonstrations.…”

Section: Introductionmentioning

confidence: 98%