Metal-free quantum-based metamaterial for surface plasmon polariton guiding with amplification

Ginzburg, Pavel; Orenstein, Meir

doi:10.1063/1.2978208

Cited by 19 publications

(14 citation statements)

References 58 publications

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“…(7) is just an illustration, and this example is generated so that the values of real and imaginary parts of dielectric permittivities are within realizable limits, the condition that can obviously be satisfied by other parameters combinations. As already pointed out, some materials must have negative imaginary part of the dielectric permittivity, which categorizes them as active dielectrics [12,13]. In our opinion, there is an additional approach to realization of materials described by Eq.…”

Section: Numerical Examples and Discussionmentioning

confidence: 99%

“…(7). It relies on (electrically or optically driven) quantum systems such as quantum cascade laser, quantum amplifier or multiple quantum wells (dots), which exhibit different values of dielectric permittivity from the background permittivity [12,13]. The sign and magnitude of real and imaginary part of this resultant permittivity depend on the design of the quantum structure in question (e.g.…”

Section: Numerical Examples and Discussionmentioning

confidence: 99%

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Engineering and Advanced Digitalization of Photonic Structures with Bound Field in the Continuum

2009

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We describe a method for generation of complex optical potentials which support a bound state of the electric field in continuous part of the spectrum. It is based on deep analogy between quantum mechanical and electromagnetic phenomena and relies on the application of supersymmetric quantum mechanics to generate a smoothly varying complex optical potential, together with the corresponding electric field function for the (single) localized state. However, the obtained potential profile is generally a strongly oscillating function which requires additional processing to make it suitable for practical realization. With this goal in mind, i.e. the construction of a realizable photonic crystal with complex permittivity which supports one bound state in continuum, we have developed an original scheme of digital grading. It approximates the values of the complex relative permittivity in such manner that the final structure may be realized by assembling layers of homogeneous materials.

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Section: Numerical Examples and Discussionmentioning

confidence: 99%

Section: Numerical Examples and Discussionmentioning

confidence: 99%

Engineering and Advanced Digitalization of Photonic Structures with Bound Field in the Continuum

2009

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“…Anyway, the point at issue here is that metamaterials are for the moment purely classical structure: they are made of wires and metallic loops, dielectric or metallic spheres or nanorods. They do not belong for the moment to the quantum world, although it should be noted that the properties of photonic structures in which quantum systems are embedded have been already explored [8]. The point at issue in what could be called "quantum metamaterials" would be to use quantum-in-essence systems (e.g.…”

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confidence: 99%

Commentary: Quantum way for metamaterials

Felbacq

2011

J. Nanophoton

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The field of nanophotonics witnesses a sort of golden age, where many new fields, such as plasmonics, metamaterials, transformation optics, have risen recently, leading to a wealth of new directions of research. The story started more than 20 years ago, when new artificial structures were imagined that could exhibit a photonic bandgap. These structures were called photonic crystals.1 They have carried a lot of hope on the possibility of molding the flow of light. It was indeed soon recognized that they could go way beyond the bandgap and that, in fact, they had a very rich band structure that allowed for control over the propagation of light itself, inside the photonic crystal. This has led to such effects as ultrarefraction, slow light, control of second harmonic emission, gradient photonic crystals, and negative refraction. Somehow, this wealth of properties has slowed down researches with the original quantum flavor of photonic crystals, at least as it appeared in the work of Sajeev John, which were seen really as devices able to control the Purcell effect. This was, for instance the case for the idea of realizing a laser cavity with a very low threshold. This aspect has shown a renewed interest recently.

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“…Strong effects of band nonparabolicity [10] result in subtle changes of the lasing wavelength at magnetic fields which maximize the gain, thus providing a path for fine--tuning of the wavelength of output radiation. Another prospective application of QCL immersed in intense magnetic field is for the design of novel (active) metamaterials where optical losses can be compensated by adding sufficient gain [11,12]. This would enable all-semiconductor metamaterial realization, which relies on using the well established technology of epitaxial growth and incorporation into existing optical semiconductor devices.…”

Section: Introductionmentioning

confidence: 99%

Charge Carrier Transport in Quantum Cascade Lasers in Strong Magnetic Field

et al. 2011

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We have developed a comprehensive rate equations based model for calculating the optical gain in the active region of a quantum cascade laser in magnetic field perpendicular to the structure layers, which takes into account all the relevant scattering channels. The model is applied to gain-optimized quantum cascade laser active region, obtained by a systematic optimization procedure based on the use of genetic algorithm, which we have previously set up for designing novel structures and improving performance of existing ones. It has proven to be very efficient in generating optimal structures which emit radiation at specified wavelengths corresponding to absorption fingerprints of particular harmful pollutants found in the atmosphere. We also illustrate another interesting prospective application of quantum cascade laser-type structures: the design of metamaterials with tunable complex permittivity, based on amplification via intersubband transitions. In this case, the role of the magnetic field is to assist the attainment of sufficient optical gain (population inversion), necessary to effectively manipulate the permittivity and fulfill the conditions for negative refraction (left-handedness).PACS: 72.10.−d, 73.21.Fg IntroductionThe mechanism of photon generation in quantum cascade laser (QCL) is based on transitions between the quasi-bound states which are associated with an ultrashort excited state lifetime corresponding to electronlongitudinal optical (LO) phonon scattering [1]. Application of a strong magnetic field has proven to be a sensitive instrument for studying and controlling these intersubband processes as it provides a path for modulating the laser output properties [2-6]. In effect, the field introduces additional quantization of the in-plane electron motion and creates a series of the Landau levels (LLs) instead of two-dimensional subbands, which resembles a quantum box structure. LLs are magnetically tunable and, depending on their configuration, phonon emission is either inhibited or resonantly enhanced. This leads to a strong modulation of the population inversion and consequently the optical gain, as a function of magnetic field.We have previously developed an automated design procedure for structural parameters optimization of the active region of mid-infrared quantum cascade laser, with the goal of maximizing the output properties, in particular the optical gain, at predefined wavelengths compliant with selected application [4][5][6][7][8]. In mid-infrared devices, the desired emission wavelength imposes the required separations between the active laser energy states, while the spacing between the lower laser level and the ground state is set by the LO phonon energy (which facilitates the population inversion by allowing the fast emptying of the lower laser state by means of nonradiative transitions). The relationships between parameters of interest are very complex, making the optimization process

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Metal-free quantum-based metamaterial for surface plasmon polariton guiding with amplification

Cited by 19 publications

References 58 publications

Engineering and Advanced Digitalization of Photonic Structures with Bound Field in the Continuum

Engineering and Advanced Digitalization of Photonic Structures with Bound Field in the Continuum

Commentary: Quantum way for metamaterials

Charge Carrier Transport in Quantum Cascade Lasers in Strong Magnetic Field

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