Nanoscale and Single-Dot Patterning of Colloidal Quantum Dots

Wang, Xie; Gomes, Raquel Guttierres; Aubert, Tangi; Bisschop, S. E.; Zhu, Yongxiang; Hens, Zeger; Brainis, Edouard; Thourhout, Dries Van

doi:10.1021/acs.nanolett.5b03068

Cited by 61 publications

(76 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the ability to dynamically regulate the coupling in single‐molecule heterostructures represents a powerful tool toward the fabrication of stimuli‐responsive and reconfigurable systems for both optoelectronic and sensing applications. Lastly, a solution‐based approach,3 in contrast to top‐down lithographic methodologies,4 is highly desirable toward the facile and low‐cost (solution processable) fabrication of nanoscale devices. [[qv: 1b,5]]…”

Section: Introductionmentioning

confidence: 99%

Tuning the Coupling in Single‐Molecule Heterostructures: DNA‐Programmed and Reconfigurable Carbon Nanotube‐Based Nanohybrids

et al. 2018

View full text Add to dashboard Cite

Herein a strategy is presented for the assembly of both static and stimuli‐responsive single‐molecule heterostructures, where the distance and electronic coupling between an individual functional nanomoiety and a carbon nanostructure are tuned via the use of DNA linkers. As proof of concept, the formation of 1:1 nanohybrids is controlled, where single quantum dots (QDs) are tethered to the ends of individual carbon nanotubes (CNTs) in solution with DNA interconnects of different lengths. Photoluminescence investigations—both in solution and at the single‐hybrid level—demonstrate the electronic coupling between the two nanostructures; notably this is observed to progressively scale, with charge transfer becoming the dominant process as the linkers length is reduced. Additionally, stimuli‐responsive CNT‐QD nanohybrids are assembled, where the distance and hence the electronic coupling between an individual CNT and a single QD are dynamically modulated via the addition and removal of potassium (K+) cations; the system is further found to be sensitive to K+ concentrations from 1 pM to 25 × 10−3 m. The level of control demonstrated here in modulating the electronic coupling of reconfigurable single‐molecule heterostructures, comprising an individual functional nanomoiety and a carbon nanoelectrode, is of importance for the development of tunable molecular optoelectronic systems and devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Tuning the Coupling in Single‐Molecule Heterostructures: DNA‐Programmed and Reconfigurable Carbon Nanotube‐Based Nanohybrids

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Moreover in [19] we showed that a dipole emitter embedded in a SiN waveguide with optimized dimensions can couple up to 43% of its emission to a single waveguide mode, with a 95% polarization ratio. Finally, we experimentally demonstrated the capability for positioning individual quantum dots at a predefined location with high yield [20]. The combination of these results shows the hybrid QD-SiN platform offers the potential for realizing efficient on chip single photon sources in combination with complex photonic circuits.…”

Section: Introductionmentioning

confidence: 78%

Ultra-compact silicon nitride grating coupler for microscopy systems

Zhu¹,

Wang²,

Wang³

et al. 2017

Opt. Express

Self Cite

View full text Add to dashboard Cite

Grating couplers have been widely used for coupling light between photonic chips and optical fibers. For various quantum-optics and bio-optics experiments, on the other hand, there is a need to achieve good light coupling between photonic chips and microscopy systems. Here, we propose an ultra-compact silicon nitride (SiN) grating coupler optimized for coupling light from a waveguide to a microscopy system. The grating coupler is about 4 by 2 μm 2 in size and a 116 nm 1 dB bandwidth can be achieved theoretically. An optimized fabrication process was developed to realize suspended SiN waveguides integrated with these couplers on top of a highly reflective bottom mirror. Experimental results show that up to 53% (2.76 dB loss) of the power of the TE mode can be coupled from a suspended SiN waveguide to a microscopy system with a numerical aperture (NA) = 0.65. Simulations show this efficiency can increase up to 75% (1.25 dB loss) for NA = 0.95.

show abstract

“…Work by Xie et al. has shown a versatile and straightforward technique of positioning a single QD on a chip by using lithography and lift‐off processes. The technique can register a single QD in a desired location with a yield of up to 40% and thus provides an efficient tool for the development of on‐chip devices based on a single QD.…”

Section: Colloidal Qd‐based Light Emittersmentioning

confidence: 99%

Novel Light Source Integration Approaches for Silicon Photonics

Wang

Abbasi

Dave

et al. 2017

Laser & Photonics Reviews

Self Cite

172

108

View full text Add to dashboard Cite

Silicon does not emit light efficiently, therefore the integration of other light-emitting materials is highly demanded for silicon photonic integrated circuits. A number of integration approaches have been extensively explored in the past decade. Here, the most recent progress in this field is reviewed, covering the integration approaches of III-V-to-silicon bonding, transfer printing, epitaxial growth and the use of colloidal quantum dots. The basic approaches to create waveguide-coupled on-chip light sources for different application scenarios are discussed, both for silicon and silicon nitride based waveguides. A selection of recent representative device demonstrations is presented, including high speed DFB lasers, ultra-dense comb lasers, short (850nm) and long (2.3μm) wavelength lasers, wide-band LEDs, monolithic O-band lasers and micro-disk lasers operating in the visible. The challenges and opportunities of these approaches are discussed.

show abstract

Nanoscale and Single-Dot Patterning of Colloidal Quantum Dots

Cited by 61 publications

References 35 publications

Tuning the Coupling in Single‐Molecule Heterostructures: DNA‐Programmed and Reconfigurable Carbon Nanotube‐Based Nanohybrids

Tuning the Coupling in Single‐Molecule Heterostructures: DNA‐Programmed and Reconfigurable Carbon Nanotube‐Based Nanohybrids

Ultra-compact silicon nitride grating coupler for microscopy systems

Novel Light Source Integration Approaches for Silicon Photonics

Contact Info

Product

Resources

About