Refractive index of In1−xGaxAsyP1−y layers and InP in the transparent wavelength region

Broberg, B.; Lindgren, S.

doi:10.1063/1.333377

Cited by 132 publications

(25 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This corresponds to an uncertainty on the effective index of 4 × 10 . This is in agreement with the observed variations of index due to the lattice mismatch observed in [16]. = a E 2 + b, where E is the wavelength energy in eV.…”

Section: Discussionsupporting

confidence: 80%

“…In order to estimate the phase mismatch accurately, a precise knowledge of the refractive indices is critical at pump, signal, and idler wavelengths. While the index of InGaAsP lattice matched to InP is well known at 1.55 μm [16][17][18][19][20], to date only one publication deals with its measurement at longer wavelengths [21], and none exists at 3 μm. This makes it crucial to accurately characterize its refractive index up to 3.14 μm, outside of the scope covered by literature data.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Widely Tunable Quantum-Dot Source Around 3 μm

Bernard¹,

Ravaro

Gérard³

et al. 2017

Quantum-Dot Based Light-Emitting Diodes

View full text Add to dashboard Cite

We propose a widely tunable parametric source in the 3 μm range, based on intracavity spontaneous parametric down conversion (SPDC) of a quantum-dot (QD) laser emitting at 1.55 μm into signal and idler modes around 3.11 μm. To compensate for material dispersion, we engineer the laser structure to emit in a higher-order transverse mode of the waveguide. The width of the latter is used as a degree of freedom to reach phase matching in narrow, deeply etched ridges, where the in-plane confinement of the QDs avoids nonradiative sidewall electron-hole recombination. Since this design depends critically on the knowledge of the refractive index of In 1−x Ga x As y P 1−y lattice matched to InP at wavelengths where no data are available in the literature, we have accurately determined them as a function of wavelength (λ = 1.55, 2.12 and 3 μm) and arsenic molar fraction (y = 0.55, 0.7 and 0.72) with a precision of ±4 × 10 −3. A pair of dichroic dielectric mirrors on the waveguide facets is shown to result in a continuous-wave optical parametric oscillator (OPO), with a threshold around 60 mW. Emission is tunable over hundreds of nanometers and expected to achieve mW levels.

show abstract

Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Widely Tunable Quantum-Dot Source Around 3 μm

Bernard¹,

Ravaro

Gérard³

et al. 2017

Quantum-Dot Based Light-Emitting Diodes

View full text Add to dashboard Cite

show abstract

“…Therefore, both normalized spectra oscillate around unity, which means that the fringe minima (in the case of AlGaInAs) and maxima (in the case of AlGaAs) are equal to the substrate/air reflection, as it is theoretically expected when the optical thickness of the layer corresponds to an even integer number of a quarter wavelength [5]. To analyze the normalized measurement we need the refractive index data of the substrate, which we have taken from Pettit and Turner for the refraction index of InP [10], whose accuracy have been proven [11,12], whereas in the case of GaAs we used the formula from Afromowitz [13], also confirmed by Gehrsitz et al [14]. Therefore, only the refractive index and the thickness of the layer were released as parameters by using a least square error fit method.…”

Section: Methodsmentioning

confidence: 99%

Empirical modeling of the refractive index for (AlGaIn)As lattice matched to InP

Grasse¹,

Boehm²,

Mueller³

et al. 2010

Semicond. Sci. Technol.

View full text Add to dashboard Cite

A composition-dependent empirical interpolation formula for the refractive index of AlGaInAs epilayers lattice matched to InP substrate has been determined by using a reflection spectroscopy technique. The 2 μm thick (AlGaIn)As layers have been grown by MBE as well as MOVPE and were characterized by x-ray diffractometry and photoluminescence measurements. The measured data from these etalon structures were fitted by using a Sellmeier equation (single oscillator model) to retrieve the refraction index for wavelengths between 2.5 and 1 μm. The resulting accurate expression will be very useful for designing optoelectronic devices like VCSELs.

show abstract

“…To minimize the coupling length, the gap should be reasonably small but not too small as to pose fabrication difficulty. The effective indices of the supermodes in this directional coupler are calculated using the finite-difference mode solver, taking into account the wavelength dependence of the core refractive index [10]. Figure 4(a) shows the effective indices of TE and TM polarizations for w = 0.4 μm, g = 0.1, and 0.3 μm.…”

Section: Structural Dependencementioning

confidence: 99%

Design of Polarization-Independent Coarse Wavelength Splitters Based on Ridge-Waveguide Directional Couplers

Lee

2011

International Journal of Optics

View full text Add to dashboard Cite

We present the first unique design of a polarization-independent dual-wavelength splitter for wavelengths around 1.3 μm and 1.55 μm that is potentially of great interest to passive optical network (PON) applications. The filter design is simple compared with the other architectures and is based on ridge-type lateral directional couplers that can be readily integrated with other planar waveguide devices. Two design examples, based on InP/InGaAsP and Si/SiGe waveguides, are given. This polarization-independent wavelength splitting is achieved by exploiting the polarization dependence of the waveguides to produce coupling lengths that are sensitive to polarization and wavelength. We show that, to split the wavelengths without splitting the polarizations, the coupling lengths must be sufficiently different for TE and TM and for the different wavelengths in order to give the correct required ratios between the TE and TM coupling lengths for the two wavelengths of interest. We also show that the same approach can be applied to the design of a polarization splitter. The crosstalk, optical bandwidth, and fabrication sensitivity for the wavelength filter are evaluated.

show abstract

Refractive index of In1−xGaxAsyP1−y layers and InP in the transparent wavelength region

Cited by 132 publications

References 17 publications

Widely Tunable Quantum-Dot Source Around 3 μm

Widely Tunable Quantum-Dot Source Around 3 μm

Empirical modeling of the refractive index for (AlGaIn)As lattice matched to InP

Design of Polarization-Independent Coarse Wavelength Splitters Based on Ridge-Waveguide Directional Couplers

Contact Info

Product

Resources

About