Disordered photonic structures for light harvesting in solar cells

Pratesi, F; Burresi, Matteo; Riboli, Francesco; Vynck, Kevin; Wiersma, Diederik S.

doi:10.1364/oe.21.00a460

Cited by 121 publications

(86 citation statements)

References 26 publications

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“…[1][2][3][4]. While performances of conventional optical elements cannot lead to substantial field concentrations below classical diffraction limit, various auxiliary nanostructures, operating with near field, could deliver deep subwavelength enhancement.…”

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confidence: 99%

Magnetic field concentration with coaxial silicon nanocylinders in the optical spectral range

et al. 2017

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mentioning

confidence: 99%

Magnetic field concentration with coaxial silicon nanocylinders in the optical spectral range

et al. 2017

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“…This assumption is valid in both the one-dimensional and two-dimensional PhCs that we consider in this manuscript. 11 We factored out the time-dependency e −iωt , as in Equation 2.3. 12 For more information about these finite-difference time-domain (FDTD) simulations: see Appendix A.…”

Section: Cavitiesmentioning

confidence: 99%

“…With these exciting goals in mind, we first need to investigate the electromagnetic eigenmodes of such a PhC. Besides being of fundamental interest, these PhCs have many applications such as omnidirectional mirrors [7], heterostructure cavities [8], slow-light generation [9], PhC LEDs [10], solar cells [11] and (chirped [12]) PhC fibers [13]. For all these applications, the design of the crystal effects the light behaviour rigorously.…”

Section: Introductionmentioning

confidence: 99%

Large area photonic crystal cavities: a local density approach

Dobbelaar¹,

Greveling²,

Oosten³

2015

Opt. Express

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Slowly chirped two-dimensional photonic crystal cavities are promising devices for creating photonic Bose-Einstein condensates. Before experimentally achieving such a condensate, one first has to thoroughly investigate the electromagnetic eigenmodes in such crystals. However, slowly chirped photonic crystals leading to cavities for light will easily have sizes in the order of tens of micrometers. Therefore simulating the behaviour of light in these crystals is very time consuming. In this thesis we demonstrate a novel and intuitive approach to obtain the envelopes of the electromagnetic modes in these crystals. An enormous advantage of this approach is that it can calculate the energies and the envelopes of these eigenmodes to a high accuracy in a few seconds. We model a chirped photonic crystal using a local density approach; we assign a potential energy for light, extracted from photonic bandstructure calculations, to each unit cell of the crystal. We also obtain an effective mass from the curvature of the photonic band at this energy. With these ingredients we are left with the task of solving the corresponding Schrödinger equation, which is an elegant and far less time-consuming exercise than calculating the envelopes of the electromagnetic modes using finite-difference time-domain simulations. In this thesis it is shown that for one-and two-dimensional quadratically chirped photonic crystals the agreement between the envelopes obtained by these simulations and the analytical ones resulting from this model is larger than 90% for the lowest energy eigenmodes. Moreover, even with small distortions on this quadratic behaviour of the widths of a onedimensional chirped photonic crystal, the corresponding numerically obtained solutions of the Schrödinger equation clearly have an excellent agreement with the simulated mode envelopes.

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“…In [12], the method presented in the present paper could have been used to investigate the effect of different randomization parameters before utilizing full wave simulations for a detailed study.…”

Section: Observations Of Randomness In the Literaturementioning

confidence: 99%

Optical role of randomness for structured surfaces

Johansen¹

2014

Appl. Opt.

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It has long been known that random height variations of a repeated nanoscale structure can give rise to smooth angular color variations instead of the well-known diffraction pattern experienced if no randomization is present. However, until now there have been few publications trying to explain this and similar phenomena taking outset in electromagnetic theory. This paper presents a method for analyzing farfield reflection from a surface constructed by translated instances of a given structure. Several examples of the effect of random translations are given.

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Disordered photonic structures for light harvesting in solar cells

Cited by 121 publications

References 26 publications

Magnetic field concentration with coaxial silicon nanocylinders in the optical spectral range

Magnetic field concentration with coaxial silicon nanocylinders in the optical spectral range

Large area photonic crystal cavities: a local density approach

Optical role of randomness for structured surfaces

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