Novel optical devices based on surface wave excitation at conducting interfaces

Mehrany, Khashayar; Khorasani, Sina; Rashidian, Bizhan

doi:10.1088/0268-1242/18/6/332

Cited by 22 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We report, in Fig. 3, the maximum of absorption for each n p case as a function of the angular (a) or spectral (b) illumination bandwidths, defined respectively by equations (8) and (15).…”

Section: From the Absorption Point Of Viewmentioning

confidence: 99%

See 1 more Smart Citation

Bandwidths limitations of giant optical field enhancements in dielectric multi-layers

Zerrad¹,

Lereu²,

N'Diaye³

et al. 2017

Opt. Express

View full text Add to dashboard Cite

Dielectric multilayers, when properly optimized, have been shown to sustain giant optical field enhancement directly linked to the imaginary index of the materials. Such giant optical field is of great interests to increase tremendously the sensitivity of optoelectronic systems. Unfortunately, this ultra-sensitive system is also highly depending on the illumination conditions. We discuss here the effect of the angular divergence and the spectral bandwidth of the incident laser beam on the absorption and field enhancement. In this study, we clearly show that giant optical field enhancements, up to several decades, may be achievable when the incident conditions are down few μrad and pm in term of angular and spectral bandwidths respectively.

show abstract

“…We report, in Fig. 3, the maximum of absorption for each n p case as a function of the angular (a) or spectral (b) illumination bandwidths, defined respectively by equations (8) and (15).…”

Section: From the Absorption Point Of Viewmentioning

confidence: 99%

“…Dielectric multi-layers have been widely investigated using either Bloch waves and band structures considerations [1][2][3][4][5][6][7][8][9][10] or optical thin film concept [11][12][13][14][15][16]. In both cases, very sharp resonances, spectrally and angularly, are anticipated.…”

Section: Introductionmentioning

confidence: 99%

Bandwidths limitations of giant optical field enhancements in dielectric multi-layers

Zerrad¹,

Lereu²,

N'Diaye³

et al. 2017

Opt. Express

View full text Add to dashboard Cite

show abstract

“…3 From the practical point of view, Tamm states could be implemented for the fabrication of polariton lasers 4 and optical modulators or filters. 5 In optics, these surface waves have been studied in both linear and nonlinear media. For a linear medium, Kossel has suggested that localized states could exist near the boundary between a homogeneous and a layered medium.…”

mentioning

confidence: 99%

Observation of staggered surface solitary waves in one-dimensional waveguide arrays

et al. 2006

View full text Add to dashboard Cite

show abstract

“…More than a decade ago, we coined the term Conducting Interface to a family of optoelectronic devices, in which the electrooptic effect is maintained by a surface accumulation or depletion of electric charges [8][9][10][11][12][13][14]. While nowadays, graphene might be regarded as the ultimate conducting interface, our initial speculation [8] had been directed towards the inversion and depletion layers, surface states [11], and in particular, the quantum confined Two-Dimensional Electron Gas (2DEG) in III/V heterostructures.…”

Section: Index Terms-mentioning

confidence: 99%

Optical Modulation by Conducting Interfaces

Karimi

Khorasani

2013

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

Abstract-We analyze the interaction of a propagating guided electromagnetic wave with a quantum well embedded in a dielectric slab waveguide. First, we design a quantum well based on InAlGaAs compounds with the transition energy of 0.8eV corresponding to a wavelength of 1.55m. By exploiting the envelope function approximation, we derive the eigenstates of electrons and holes and the transition dipole moments, through solution of the Luttinger Hamiltonian. Next, we calculate the electrical susceptibility of a threelevel quantum system (as a model for the two-dimensional electron gas trapped in the waveguide), by using phenomenological optical Bloch equations. We show that the two-dimensional electron gas behaves as a conducting interface, whose conductivity can be modified by controlling the populations of electrons and holes the energy levels. Finally, we design a slab waveguide in which a guided wave with the wavelength of 1.55m experiences a strong coupling to the conducting interface. We calculate the propagation constant of the wave in the waveguide subject to the conducting interface, by exploiting the modified transfer matrix method, and establish it linear dependence on the interface conductivity. By presenting a method for controlling the populations of electrons and holes, we design a compact optical modulator with an overall length of around 60m. Most of these applications are realized using physical phenomena such as electrooptic, thermooptic, or magnetooptic effects to allow control over the propagation and transmission of optical wavefronts. Modulation speeds in excess of 50GHz have so far been achieved in the basic Mach-Zhender Modulator (MZM) configuration. While MZM could utilize virtually any physical effect to allow optical modulation, normally the linear electrooptic effect in bulk semiconductors is used. High speed modulation is also possible using internal modulation schemes, for instance, by direct current modulation [6,7]. However, most wideband applications require external modulation of light. A common material which is widely used in this area is LiNbO 3 . But there is a drawback in using MZMs as external modulators is that they normally require very long propagation lengths of the order of a few millimeters. This requirement makes the MZMs highly inappropriate for integrated fabrication. There is also another problem with routine material platforms, which happen to be incompatible with the standard III/V compound semiconductor technology. Index Terms-Hence, one should look for an alternative physical phenomenon other than the above, which would enable strong modulation, ease of fabrication, compatibility with III/V optoelectronics integration, linear response, tunability, and possibility of modern quantum optical applications including quantum information processing and cavity quantum electrodynamics.More than a decade ago, we coined the term Conducting Interface to a family of optoelectronic devices, in which the electrooptic effect is maintained by a surface accumulation or deplet...

show abstract

Novel optical devices based on surface wave excitation at conducting interfaces

Cited by 22 publications

References 33 publications

Bandwidths limitations of giant optical field enhancements in dielectric multi-layers

Bandwidths limitations of giant optical field enhancements in dielectric multi-layers

Observation of staggered surface solitary waves in one-dimensional waveguide arrays

Optical Modulation by Conducting Interfaces

Contact Info

Product

Resources

About