III-V Semiconductor Optical Micro-Ring Resonators

Grover, R.

doi:10.1063/1.1764016

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…The transfer matrix of the S-bend, taper, and Y-branches were modeled with transfer matrices T S , T T , and T Y , respectively. The coupling between the two QCLs were calculated using the following scattering matrix: where κ and τ are coupling and transmission coefficients in the coupler and vary as a function of the coupler length and − j is the phase factor.…”

Section: Device Designmentioning

confidence: 99%

Continuous Frequency Tuning with near Constant Output Power in Coupled Y-Branched Terahertz Quantum Cascade Lasers with Photonic Lattice

et al. 2018

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We demonstrate continuous frequency tuning in terahertz quantum cascade lasers with double metal waveguides using a Y-branched coupler. Two THz QCLs placed side-by-side couple by evanescent fields across the air gap between them. Each QCL waveguide comprises a 48-μm-wide coupler and S-bend section, which are connected to an 88-μm-wide Y-branch through an impedance matching tapered section. Photonic lattices are patterned on top of the coupler section in each QCL using focused ion-beam milling to control the spectral characteristics. The waveguide design used for individual QCL sections is optimized using finite element modeling and the spectral characteristics are modeled using a transfer matrix model. Continuous frequency tuning of ∼19 GHz is demonstrated while maintaining an output power of ∼4.2−4.8 mW and a heat sink temperature of 50 K. The tuning is controlled electrically through Stark shift and cavity pulling effects by driving both QCLs simultaneously and represents the widest electrically controlled continuous tuning performance from a THz QCL without significant change in output power.

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Section: Device Designmentioning

confidence: 99%

Continuous Frequency Tuning with near Constant Output Power in Coupled Y-Branched Terahertz Quantum Cascade Lasers with Photonic Lattice

et al. 2018

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“…The main drawback of this design strategy is the quite limited quality factor and finesse of these devices. Among III-V semiconductor materials, In 1−x Ga x As y P 1−y / InP material system has permitted to fabricate ring resonators having a lager quality factor with respect to those realized using GaAs / Al x Ga 1−x As material system [36].…”

Section: Introductionmentioning

confidence: 99%

Quality factor and finesse optimization in buried InGaAsP/InP ring resonators

Ciminelli

Passaro²,

Dell’Olio³

et al. 2009

J. Eur. Opt. Soc.-Rapid Publ.

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Quality factor and finesse of buried In 1−x Ga x As y P 1−y / InP ring resonators have been optimized in this paper by a very general modelling technique. Limiting effect of propagation loss within the ring has been investigated using a three-dimensional (3D) highly accurate complex mode solver based on mode matching method to analyze bending loss dependence on ring radius and wavelength. Coupling between straight input/output (I/O) bus waveguides and ring resonator has been studied by 3D Beam Propagation Method (BPM), deriving coupling loss and coupling coefficient for a large range of ring radius and bus waveguides-ring distance values (for both polarizations). Ring resonator has been modelled by the transfer-matrix approach, while finesse and quality factor dependence on radius has been estimated for two resonator architectures (including one or two I/O bus waveguides) and for quasi-TE and quasi-TM modes. Guiding structure has been optimized to enhance resonator performance. The modelling approach has been validated by comparing results obtained by our algorithm with experimental data reported in literature. Influence of rejection (at resonance wavelength) at through port on quality factor and finesse has been widely discussed. A quality factor larger than 8×10 5 has been predicted for the ring resonator employing only one I/O bus waveguide and having a radius of 400 µm. This resonator exhibits a rejection of -8 dB at through port.

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Materials, Fabrication and Characterization Methods

Rabus

Sada²

2020

Springer Series in Optical Sciences

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III-V Semiconductor Optical Micro-Ring Resonators

Cited by 11 publications

References 35 publications

Continuous Frequency Tuning with near Constant Output Power in Coupled Y-Branched Terahertz Quantum Cascade Lasers with Photonic Lattice

Continuous Frequency Tuning with near Constant Output Power in Coupled Y-Branched Terahertz Quantum Cascade Lasers with Photonic Lattice

Quality factor and finesse optimization in buried InGaAsP/InP ring resonators

Materials, Fabrication and Characterization Methods

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