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Benjamin Dwir

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Publications associées (65)

Site-controlled InGaAs/GaAs pyramidal quantum dots grown by MOVPE on patterned substrates using triethylgallium

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Bruno Marie Dominique Rigal, Alexey Lyasota

The fabrication and characterization of site-controlled InGaAs/GaAs quantum dots (QDs) made by MOVPE using triethylgallium (TEGa) on patterned {111}B GaAs substrates are reported. Results are compared to more traditional pyramidal QD structures grown emplo ...

Elsevier Science Bv2015

Integration of multiple site-controlled pyramidal quantum dot systems with photonic-crystal membrane cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Alexey Lyasota

We describe the fabrication, epitaxial growth and photoluminescence (PL) spectra of systems of site-controlled pyramidal quantum dots (QDs) integrated with photonic crystal (PhC) membrane cavities. The spectra of the individual QDs are characterized by sca ...

Elsevier Science Bv2015

Multiexciton dynamics in tailored band-gap quasi-one-dimensional systems

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Justyna Szeszko

Optoelectronic properties of site-controlled AlGaAs/GaAs quasi-one-dimensional structures are investigated. Controllable linear variation of the band gap along the vertical axis of the quantum wire, symmetrical with respect to its center, results in a set ...

Amer Physical Soc2015

Optical Injection and Lasing Dynamics in Long-Wavelength VCSELs With Intracavity Patterning

Benjamin Dwir, Elyahou Kapon, Alexei Sirbu, Vladimir Iakovlev, Alexandru Mereuta, Andrei Caliman, Zlatko Mickovic, Christopher Michael Long, Dalila Ellafi

We present the static and optical injection response of wafer-fused long-wavelength VCSELs with and without intracavity patterning. It is found that the extra optical cavity patterning increases the gain anisotropy between orthogonal polarization modes, in ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Site-controlled quantum dots coupled to a photonic crystal molecule

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Milan Calic, Bruno Marie Dominique Rigal

Two site-controlled quantum dots (QDs) were integrated in a photonic crystal molecule (PCM) formed by L3 nanocavities. A statistical analysis of the coupled cavity modes demonstrated the formation of bonding and anti-bonding delocalized PCM states. Exciton ...

American Institute of Physics2015

Polarization properties and disorder effects in H-3 photonic crystal cavities incorporating site-controlled, high-symmetry quantum dot arrays

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessandro Surrente, Pascal Gallo, Marco Felici

We report on the effects of optical disorder on breaking the symmetry of the cavity modes of H-3 photonic crystal cavities incorporating site-controlled pyramidal quantum dots (QDs) as the internal light source. The high in-plane symmetry of the polarizati ...

Amer Inst Physics2015

Optical injection locking of transverse modes in 1.3-mu m wavelength coupled-VCSEL arrays

Benjamin Dwir, Elyahou Kapon, Alexei Sirbu, Vladimir Iakovlev, Alexandru Mereuta, Andrei Caliman, Lukas Mutter, Christopher Michael Long

Optical injection locking of 1.3-mu m phase-locked VCSEL arrays defined by patterned tunnel junctions and wafer fusion is investigated experimentally and theoretically. The impact of the overlap between the master laser injection beam and the injected mode ...

Optical Society of America2014

Effects of surface plasmon polariton-mediated interactions on second harmonic generation from assemblies of pyramidal metallic nano-cavities

Benjamin Dwir, Elyahou Kapon, Justyna Szeszko

We use polarization-resolved two-photon microscopy to investigate second harmonic generation (SHG) from individual assemblies of site-controlled nano-pyramidal recess templates covered with silver films. We demonstrate the effect of the surface plasmon pol ...

Optical Soc Amer2014

Metamorphic InAlAs/InGaAs/InAlAs/GaAs HEMT heterostructures containing strained superlattices and inverse steps in the metamorphic buffer

Philippe Buffat, Benjamin Dwir, Elena Suvorova Buffat

Metamorphic InxAl1-xAs buffer design features influence on electrophysical and structural properties of the heterostructures was investigated. Two types of MHEMT heterostructures In0.70Al0.30As/In0.76Ga0.24As with novel design contained inverse steps or st ...

Elsevier Science Bv2013

1D and 2D arrays of coupled photonic crystal cavities with a site-controlled quantum wire light source

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Pascal Gallo, Clément William Tendaï Jarlov, Milan Calic

We investigated experimentally 1D and 2D arrays of coupled L3 photonic crystal cavities. The optical modes of the coupled cavity arrays are fed by a site-controlled quantum wire light source. By performing photoluminescence measurements and relying on near ...

Optical Society of America2013

Transverse mode discrimination in long-wavelength wafer-fused vertical-cavity surface-emitting lasers by intra-cavity patterning

Benjamin Dwir, Elyahou Kapon, Alexei Sirbu, Vladimir Iakovlev, Alexandru Mereuta, Andrei Caliman, Nicolas Volet, Zlatko Mickovic, Pascal Gallo, Lukas Mutter

Transverse mode discrimination is demonstrated in long-wavelength wafer-fused vertical-cavity surface-emitting lasers using ring-shaped air gap patterns at the fused interface between the cavity and the top distributed Bragg reflector. A significant number ...

Optical Society of America2013

Influence of metamorphic buffer design on electrophysical and structural properties of MHEMT nanoheterostructures In0.7Al0.3As/In0.7Ga0.3As/In0.7Al0.3As/GaAs

Philippe Buffat, Benjamin Dwir, Elena Suvorova Buffat

Metamorphic InxAl1-xAs buffer design influence on electrophysical and structural properties of the MHEMT nanoheterostructures was investigated. Electrophysical properties of the nanoheterostructures were characterized by Hall measurements, while the struc ...

2012

Photocurrent spectroscopy of site-controlled pyramidal quantum dots

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Jérôme Faist, Pascal Gallo, Arun Mohan

Intraband photocurrent spectroscopy of site-controlled pyramidal quantum dots by inserting them into the intrinsic region of n-i-n like quantum dot infrared photodetector structure is reported. The photovoltaic response is observed in the mid-infrared regi ...

American Institute of Physics2012

Experimental evidence for Luttinger liquid behavior in sufficiently long GaAs V-groove quantum wires

Benjamin Dwir, Elyahou Kapon, Alok Rudra

We have measured the temperature dependence of the conductance of long V-groove quantum wires fabricated using GaAs/AlGaAs heterostructures, in a wide temperature range (200 mK < T < 4.2 K). We find that for our quantum wires the Fermi velocity can be as l ...

2012

Magneto-optical properties of single site-controlled InGaAsN quantum wires grown on prepatterned GaAs substrates

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Romain Carron, Pascal Gallo, Marco Felici

The properties of single site-controlled InGaAsN quantum wires (QWRs)-both untreated and irradiated with atomic hydrogen-are probed by micro-magnetophotoluminescence spectroscopy. The strong anisotropy of the diamagnetic shift measured for different orient ...

2012

Bound and anti-bound biexciton in site-controlled pyramidal GaInAs/GaAs quantum dots

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Milan Calic

We present a detailed study of biexciton complexes formed in single, site-controlled pyramidal GaInAs/GaAs quantum dots (QDs). By using power dependent measurements and photon correlation spectroscopy, we identify the excitonic transitions of a large numbe ...

American Institute of Physics2012

Reduced temperature sensitivity of the polarization properties of hydrogenated InGaAsN V-groove quantum wires

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Romain Carron, Marco Felici

We investigated the effects of hydrogen irradiation on the degree of linear polarization, rho, of the light emitted by site-controlled, dilute-nitride InGaAsN V-groove quantum wires (QWRs). While in the as-grown sample the polarization of the QWR emission ...

American Institute of Physics2012

Large mode splitting and lasing in optimally coupled photonic-crystal microcavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov

Coupling of L-type photonic-crystal (PhC) cavities in a geometry that follows inherent cavity field distribution is exploited for demonstrating large mode splitting of up to similar to 10-20 nm (similar to 15-30 meV) near 1 mu m wavelength. This is much la ...

Optical Society of America2011

Phonon-Mediated Coupling of InGaAs/GaAs Quantum-Dot Excitons to Photonic Crystal Cavities

Vincenzo Savona, Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Guillaume Jean Tarel, Pascal Gallo, Milan Calic

We demonstrate that the emission characteristics of site-controlled InGaAs/GaAs single quantum dots embedded in photonic crystal slab cavities correspond to single confined excitons coupled to cavity modes, unlike previous reports of similar systems based ...

2011

Ordered systems of site-controlled pyramidal quantum dots incorporated in photonic crystal cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessandro Surrente, Pascal Gallo, Marco Felici

The coupling of a prescribed number of site-controlled pyramidal quantum dots (QDs) with photonic crystal (PhC) cavities was studied by polarization and power-dependent photoluminescence measurements. The energy of the cavity mode could be readily tuned, m ...

Institute of Physics2011

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