Higher order modes in photonic crystal slabs

Gansch, Roman; Kalchmair, S.; Detz, Hermann; Andrews, A. M.; Klang, P.; Schrenk, W.; Strasser, G.

doi:10.1364/oe.19.015990

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…The confinement in the z -direction induces a blue-shift of the photonic crystal modes. Compared with the fundamental mode, the confinement of higher order modes is weaker and the blue-shift is stronger 32 . In our structure, only the fundamental 0th order modes and the 1st order modes overlap in frequency with our photodetector absorption.…”

Section: Resultsmentioning

confidence: 98%

Measurement of bound states in the continuum by a detector embedded in a photonic crystal

et al. 2016

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We directly measure optical bound states in the continuum (BICs) by embedding a photodetector into a photonic crystal slab. The BICs observed in our experiment are the result of accidental phase matching between incident, reflected and in-plane waves at seemingly random wave vectors in the photonic band structure. Our measurements were confirmed through a rigorously coupled-wave analysis simulation in conjunction with temporal coupled mode theory. Polarization mixing between photonic crystal slab modes was observed and described using a plane wave expansion simulation. The ability to probe the field intensity inside the photonic crystal and thereby to directly measure BICs represents a milestone in the development of integrated opto-electronic devices based on BICs.

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Section: Resultsmentioning

confidence: 98%

Measurement of bound states in the continuum by a detector embedded in a photonic crystal

et al. 2016

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“…When the broadband source is used, a fundamental waveguide mode appears at the wavelength of 561.5 nm, in addition to the higher order waveguide modes, which appear between the wavelengths of 200 nm and 300 nm, as shown in Figure 5 a. These higher order modes are basically generated by the confinement of the photons within the slab waveguide, forming subbands in the structure [ 39 ]. However, it has been demonstrated that when a higher order mode is located near the peak wavelength of the fundamental mode, the intensities of both the fundamental and the higher order mode rise upon the increase of the pump power, reducing the efficiency of the fundamental mode [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

A hybrid photonic-plasmonic resonator based on a partially encapsulated 1D photonic crystal waveguide and a plasmonic nanoparticle

Gökbulut

2022

Heliyon

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“…13 Another way to change the resonance frequency by a factor n is scaling the whole structure by n. This remarkable property is due to the scale invariance of Maxwell's equations. Using these two methods, it is possible to obtain a variety of PCS that all exhibit the chosen PCS mode at the same frequency.…”

Section: Simulationmentioning

confidence: 99%

Optimized photonic crystal design for quantum well infrared photodetectors

Reininger

Kalchmair

Gansch

et al. 2012

Photonic Crystal Materials and Devices X

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The performance of quantum well infrared photodetectors (QWIP) can be significantly enhanced combining it with a photonic crystal slab (PCS) resonator. In such a system the chosen PCS mode is designed to coincide with the absorption maximum of the photodetector by adjusting the lattice parameters. However there is a multitude of parameter sets that exhibit the same resonance frequency of the chosen PCS mode.We have investigated how the choice of the PC design can be exploited for a further enhancement of QWIPs. Several sets of lattice parameters that exhibit the chosen PCS mode at the same resonance frequency have been obtained and the finite difference time domain method was used to simulate the absorption spectra of the different PCS. A photonic crystal slab quantum well infrared photodetector with three different photonic crystal lattice designs that exhibit the same resonance frequency of the chosen PCS mode were designed, fabricated and measured.This work shows that the quality factor of a PCS-QWIP and therefore the absorption enhancement can be increased by an optimized PCS design. The improvement is a combined effect of a changed lattice constant, PC normalized radius and normalized slab thickness. An enhancement of the measured photocurrent of more than a factor of two was measured.

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Higher order modes in photonic crystal slabs

Cited by 9 publications

References 19 publications

Measurement of bound states in the continuum by a detector embedded in a photonic crystal

Measurement of bound states in the continuum by a detector embedded in a photonic crystal

A hybrid photonic-plasmonic resonator based on a partially encapsulated 1D photonic crystal waveguide and a plasmonic nanoparticle

Optimized photonic crystal design for quantum well infrared photodetectors

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