The effect of the sin optical constants on the performances of a new antireflection coating concept

Beye, Modou; Maiga, Amadou Seidou; Ndiaye, Fatou

doi:10.1109/ceat.2013.6775659

Cited by 2 publications

(4 citation statements)

References 23 publications

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“…The experimental demonstration in References [29][30][31][32] raised important theoretical questions regarding the conditions for complete antireflection from resonance. In Reference [29], the antireflection effect is attributed to the tendency of the resonance to radiate dominantly into the dielectric material.…”

Section: Introductionmentioning

confidence: 98%

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Sufficient condition for perfect antireflection by optical resonance at dielectric interface

Wang

Sandhu

et al. 2015

SPIE Proceedings

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Reflection occurs at an air-material interface. The development of antireflection schemes, which aims to cancel such reflection, is important for a wide variety of applications including solar cells and photodetectors. Recently, it has been demonstrated that a periodic array of resonant subwavelength objects placed at an air-material interface can significantly reduce reflection that otherwise would have occurred at such an interface. Here, we introduce the theoretical condition for complete reflection cancellation in this resonant antireflection scheme. Using both general theoretical arguments and analytical temporal coupled-mode theory formalisms, we show that in order to achieve perfect resonant antireflection, the periodicity of the array needs to be smaller than the free-space wavelength of the incident light for normal incidence, and also the resonances in the subwavelength objects need to radiate into air and the dielectric material in a balanced fashion. Our theory is validated using first-principles full-field electromagnetic simulations of structures operating in the infrared wavelength ranges. For solar cell or photodetector applications, resonant antireflection has the potential of providing a low-cost technique for antireflection that does not require nanofabrication into the absorber materials, which may introduce detrimental effects such as additional surface recombination. Our work here provides theoretical guidance for the practical design of such resonant antireflection schemes.

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Section: Introductionmentioning

confidence: 98%

“…In recent years, a new approach for antireflection has been proposed and widely adopted [29][30][31][32][33][34][35][36][37][38]. In this approach, one places arrays of nanoparticles at or near the air-dielectric interface ( Figure 1).…”

Section: Introductionmentioning

confidence: 98%

Sufficient condition for perfect antireflection by optical resonance at dielectric interface

Wang

Sandhu

et al. 2015

SPIE Proceedings

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show abstract

“…In recent years, a new approach for antireflection has been proposed and widely adopted [24][25][26][27][28][29][30][31][32][33]. In this approach, one places arrays of nanoparticles at or near the air-dielectric interface ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The experimental demonstration in Refs. [24][25][26][27] raised important theoretical questions regarding the conditions for complete antireflection from resonance. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Condition for perfect antireflection by optical resonance at material interface

Wang¹,

Yu²,

Sandhu³

et al. 2014

Optica

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Reflection occurs at an air-material interface. The development of antireflection schemes, which aims to cancel such reflection, is important for a wide variety of applications including solar cells and photodetectors. Recently, it has been demonstrated that a periodic array of resonant subwavelength objects placed at an air-material interface can significantly reduce reflection that otherwise would have occurred at such an interface. Here, we introduce the theoretical condition for complete reflection cancellation in this resonant antireflection scheme. Using both general theoretical arguments and analytical temporal coupled-mode theory formalisms, we show that in order to achieve perfect resonant antireflection, the periodicity of the array needs to be smaller than the free-space wavelength of the incident light for normal incidence, and also the resonances in the subwavelength objects need to radiate into air and the dielectric material in a balanced fashion. Our theory is validated using first-principles full-field electromagnetic simulations of structures operating in the infrared wavelength ranges. For solar cell or photodetector applications, resonant antireflection has the potential for providing a low-cost technique for antireflection that does not require nanofabrication into the absorber materials, which may introduce detrimental effects such as additional surface recombination. Our work here provides theoretical guidance for the practical design of such resonant antireflection schemes.

show abstract

The effect of the sin optical constants on the performances of a new antireflection coating concept

Cited by 2 publications

References 23 publications

Sufficient condition for perfect antireflection by optical resonance at dielectric interface

Sufficient condition for perfect antireflection by optical resonance at dielectric interface

Condition for perfect antireflection by optical resonance at material interface

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