Mid-infrared wavelength division (de)multiplexer using an interleaved angled multimode interferometer on the silicon-on-insulator platform

Abstract Thanks to the unique molecular fingerprints in the mid-infrared spectral region, absorption spectroscopy in this regime has attracted widespread attention in recent years. Contrary to commercially available infrared spectrometers, which are limited by being bulky and cost-intensive, laboratory-on-chip infrared spectrometers can offer sensor advancements including raw sensing performance in addition to use such as enhanced portability. Several platforms have been proposed in the past for on-chip ethanol detection. However, selective sensing with high sensitivity at room temperature has remained a challenge. Here, we experimentally demonstrate an on-chip ethyl alcohol sensor based on a holey photonic crystal waveguide on silicon on insulator-based photonics sensing platform offering an enhanced photoabsorption thus improving sensitivity. This is achieved by designing and engineering an optical slow-light mode with a high group-index of n g = 73 and a strong localization of modal power in analyte, enabled by the photonic crystal waveguide structure. This approach includes a codesign paradigm that uniquely features an increased effective path length traversed by the guided wave through the to-be-sensed gas analyte. This PIC-based lab-on-chip sensor is exemplary, spectrally designed to operate at the center wavelength of 3.4 μm to match the peak absorbance for ethanol. However, the slow-light enhancement concept is universal offering to cover a wide design-window and spectral ranges towards sensing a plurality of gas species. Using the holey photonic crystal waveguide, we demonstrate the capability of achieving parts per billion levels of gas detection precision. High sensitivity combined with tailorable spectral range along with a compact form-factor enables a new class of portable photonic sensor platforms when combined with integrated with quantum cascade laser and detectors.

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Silicon-on-insulator mid-infrared planar concave grating based (de)multiplexer

2013 IEEE Photonics Conference ◽

10.1109/ipcon.2013.6656389 ◽

2013 ◽

Cited By ~ 1

Author(s):

M. Muneeb ◽

X. Chen ◽

E. Ryckeboer ◽

A. Malik ◽

G. Z. Mashanovich ◽

...

Keyword(s):

Silicon On Insulator ◽

Mid Infrared ◽

Planar Concave Grating ◽

Concave Grating

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Compact low loss silicon-on-insulator waveguide for broadband mid-infrared photonics

2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR) ◽

10.1109/cleopr.2017.8118901 ◽

2017 ◽

Author(s):

Bowei Dong ◽

Xianshu Luo ◽

Hong Wang ◽

Chengkuo Lee ◽

Guo-Qiang Lo

Keyword(s):

Silicon On Insulator ◽

Low Loss ◽

Mid Infrared

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Efficient mid-infrared wavelength converter based on plasmon-enhanced nonlinear response in graphene nanoribbons

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/ac3e92 ◽

2021 ◽

Author(s):

Jiao Chi ◽

Hongjun Liu ◽

Zhaolu Wang ◽

Nan Huang

Keyword(s):

Graphene Sheet ◽

Surface Plasmon ◽

Surface Plasmon Polaritons ◽

Graphene Nanoribbons ◽

Wavelength Converter ◽

Third Order ◽

Mid Infrared ◽

Infrared Wavelength ◽

Graphene Plasmons ◽

Plasmon Polaritons

Abstract Graphene plasmons with enhanced localized electric field have been used for boosting the light-matter interaction in linear optical nano-devices. Meanwhile, graphene is an excellent nonlinear material for several third-order nonlinear processes. We present a theoretical investigation of the mechanism of plasmon-enhanced third-order nonlinearity susceptibility of graphene nanoribbons. It is demonstrated that the third-order nonlinearity susceptibility of graphene nanoribbons with excited graphene surface plasmon polaritons can be an order of magnitude larger than the intrinsic susceptibility of a continuous graphene sheet. Combining these properties with the relaxed phase matching condition due to the ultrathin graphene, we propose a novel plasmon-enhanced mid-infrared wavelength converter with arrays of graphene nanoribbons. The wavelength of sig-nal light is in mid-infrared range, which can excite the tunable surface plasmon polaritons in arrays of graphene nanoribbons. The efficiency of the converter from mid-infrared to near-infrared wavelength can be remarkably improved by 60 times compared with the graphene sheet without graphene plasmons. This work provides a novel idea for the efficient application of graphene in the nonlinear optical nano-devices. The proposed mid-infrared wavelength converter is compact, tunable and has promising potential in graphene-based mid-infrared detector with high detection efficiency.

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BaF2 Ridge Waveguide Operating at Mid-Infrared Wavelength

Frontiers in Physics ◽

10.3389/fphy.2021.766905 ◽

2021 ◽

Vol 9 ◽

Author(s):

Yazhou Cheng ◽

Xinbin Zhang ◽

Hongxiao Song

Keyword(s):

Ion Irradiation ◽

Lattice Structure ◽

Near Field ◽

Annealing Treatment ◽

Femtosecond Laser Ablation ◽

Ridge Waveguide ◽

Propagation Loss ◽

Mid Infrared ◽

Infrared Wavelength ◽

Coupling System

We report on the fabrication of optical ridge waveguide in barium fluoride (BaF2) crystal by 15 MeV C5+ ions irradiation with femtosecond laser ablation. The near-field modal profile and propagation loss of the waveguide at mid-infrared wavelength 4 µm are investigated by using end-face coupling system. We implement a series of annealing treatment and it efficiently reduces the propagation loss of the waveguide. The confocal Raman spectra demonstrate that the lattice structure of BaF2 crystal does not change largely after C5+ ion irradiation.

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Antimonide-based resonant tunneling photodetectors for mid infrared wavelength light detection

Infrared Remote Sensing and Instrumentation XXV ◽

10.1117/12.2274917 ◽

2017 ◽

Author(s):

Fabian Hartmann ◽

Andreas Pfenning ◽

Georg Knebl ◽

Robert Weih ◽

Andreas Bader ◽

...

Keyword(s):

Resonant Tunneling ◽

Light Detection ◽

Mid Infrared ◽

Infrared Wavelength ◽

Wavelength Light

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Broadband and high-efficient mid-infrared wavelength conversion in a graphene-covered silicon ridge waveguide

Sixth Symposium on Novel Optoelectronic Detection Technology and Applications ◽

10.1117/12.2561034 ◽

2020 ◽

Author(s):

Xibin Li ◽

Jiaxin Xu ◽

Zhihua Tu

Keyword(s):

Wavelength Conversion ◽

Ridge Waveguide ◽

Mid Infrared ◽

Infrared Wavelength ◽

High Efficient

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100 Gb/s Silicon Photonic WDM Transmitter with Misalignment-Tolerant Surface-Normal Optical Interfaces

Micromachines ◽

10.3390/mi10050336 ◽

2019 ◽

Vol 10 (5) ◽

pp. 336 ◽

Cited By ~ 2

Author(s):

Beiju Huang ◽

Zanyun Zhang ◽

Zan Zhang ◽

Chuantong Cheng ◽

Huang Zhang ◽

...

Keyword(s):

Wavelength Division Multiplex ◽

Complementary Metal Oxide Semiconductor ◽

Silicon On Insulator ◽

Oxide Semiconductor ◽

Optical Modulator ◽

Grating Coupler ◽

Coupling Loss ◽

Wavelength Division ◽

Silicon Photonic ◽

Fiber Misalignment

A 4 × 25 Gb/s ultrawide misalignment tolerance wavelength-division-multiplex (WDM) transmitter based on novel bidirectional vertical grating coupler has been demonstrated on complementary metal-oxide-semiconductor (CMOS)-compatible silicon-on-insulator (SOI) platform. Simulations indicate the bidirectional grating coupler (BGC) is widely misalignment tolerant, with an excess coupling loss of only 0.55 dB within ±3 μm fiber misalignment range. Measurement shows the excess coupling loss of the BGC is only 0.7 dB within a ±2 μm fiber misalignment range. The bidirectional grating structure not only functions as an optical coupler, but also acts as a beam splitter. By using the bidirectional grating coupler, the silicon optical modulator shows low insertion loss and large misalignment tolerance. The eye diagrams of the modulator at 25 Gb/s don’t show any obvious deterioration within the waveguide-direction fiber misalignment ranger of ±2 μm, and still open clearly when the misalignment offset is as large as ±4 μm.

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Thermo-Optic Tunable Optical Filter Based on Fabry-Perot Microcavities in SOI

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.6-7.194 ◽

2012 ◽

Vol 6-7 ◽

pp. 194-199

Author(s):

Zhe Li ◽

Hua Juan Qi ◽

Yong Chuan Xiao ◽

Feng Li Gao

Keyword(s):

Refractive Index ◽

Wavelength Division Multiplexing ◽

Optical Filter ◽

Silicon On Insulator ◽

Central Wavelength ◽

Wavelength Division ◽

Tunable Optical Filter ◽

Compact Size ◽

Fabry Perot ◽

Output Characteristics

An integrated TOF (Tunable Optical Filter) based on thermo-optic effect in Silicon on insulator (SOI) rib waveguide is designed and simulated. The device is comprised of two high refractivity contrast Si/Air stacks, functioning as high reflectivity of DBRs and separated by a variable refractive index Si F-P cavity. The output characteristics are calculated and simulated based on Transfer Matrix Method (TMM). Wavelength tuning is achieved through thermal modulation of refractive variation of the cavity.As the cavity Si is heated,the refractive index of the cavity increases.When the temperature of cavity Si changes within100°C，the central wavelength gets a continuous 8nm shift from 1550nm to 1558nm, which is right located in the WDM (Wavelength division multiplexing) networks operating at C-band. Moreover, by calculating, the tuning sensitivity is about 0.08nm/°C. Owing to the compact size and excellent characteristics of integration, the proposed component has a promising utilization in spectroscopy and optical communication.

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