Optical properties of semiconductor quantum structures relevant for practical applications

2012 ◽  
Author(s):  
Sandip Ghosh
Keyword(s):  
Optical Properties ◽  
Quantum Structures ◽  
Practical Applications

scholarly journals Towards practical applications of quantum emitters in boron nitride

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. Koperski ◽  
K. Pakuła ◽  
K. Nogajewski ◽  
A. K. Dąbrowska ◽  
M. Tokarczyk ◽  
...  
Keyword(s):  
Optical Properties ◽  
Boron Nitride ◽  
Vapour Phase ◽  
Emission Characteristics ◽  
Vapour Phase Epitaxy ◽  
Practical Applications ◽  
Metalorganic Vapour Phase Epitaxy ◽  
Polydimethylsiloxane Films ◽  
Background Luminescence ◽  
Quantum Emitters

AbstractWe demonstrate quantum emission capabilities from boron nitride structures which are relevant for practical applications and can be seamlessly integrated into a variety of heterostructures and devices. First, the optical properties of polycrystalline BN films grown by metalorganic vapour-phase epitaxy are inspected. We observe that these specimens display an antibunching in the second-order correlation functions, if the broadband background luminescence is properly controlled. Furthermore, the feasibility to use flexible and transparent substrates to support hBN crystals that host quantum emitters is explored. We characterise hBN powders deposited onto polydimethylsiloxane films, which display quantum emission characteristics in ambient environmental conditions.

Structural and optical properties of GaInNAs/GaAs quantum structures

2004 ◽  
Vol 16 (31) ◽  
pp. S3009-S3026 ◽  
Author(s):  
T Hakkarainen ◽  
J Toivonen ◽  
H Koskenvaara ◽  
M Sopanen ◽  
H Lipsanen
Keyword(s):  
Optical Properties ◽  
Quantum Structures ◽  
Structural And Optical Properties

Influence of MBE growth conditions on optical properties of CdTe/ZnTe quantum structures

2000 ◽  
Vol 367 (1-2) ◽  
pp. 210-215 ◽  
Author(s):  
S Maćkowski ◽  
G Karczewski ◽  
F Kyrychenko ◽  
T Wojtowicz ◽  
J Kossut
Keyword(s):  
Optical Properties ◽  
Growth Conditions ◽  
Quantum Structures ◽  
Mbe Growth

Influence of pressure on the optical properties ofInxGa1−xNepilayers and quantum structures

2001 ◽  
Vol 64 (11) ◽  
Author(s):  
P. Perlin ◽  
I. Gorczyca ◽  
T. Suski ◽  
P. Wisniewski ◽  
S. Lepkowski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Structures

Formation and optical properties of SiGe/Si quantum structures

1996 ◽  
Vol 102 ◽  
pp. 263-271 ◽  
Author(s):  
Y. Shiraki ◽  
H. Sunamura ◽  
N. Usami ◽  
S. Fukatsu
Keyword(s):  
Optical Properties ◽  
Quantum Structures

scholarly journals Multiple-Color Reflectors Using Bichiral Liquid Crystal Polymer Films and Their Applications in Liquid Crystal Displays

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3031
Author(s):  
Cheng-Kai Liu ◽  
Ming-Hsien Li ◽  
Chi-Lun Ting ◽  
Andy Ying-Guey Fuh ◽  
Ko-Ting Cheng
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Polymer Films ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Utilization Efficiency ◽  
Light Sources ◽  
Practical Applications ◽  
Crystal Polymer ◽  
Pitch Length

Multiple-color reflectors using bichiral liquid crystal polymer films (BLCPFs) are investigated. The BLCPFs consist of alternate layers of two different single-pitch cholesteric liquid crystal (CLC) layers, named CLC#A and CLC#B. The thickness of each CLC layer equals its single pitch length. The optical properties in terms of reflections, reflection-wavelength ranges, and distributions of reflection spectra of the BLCPFs that result from the fixed pitch length of CLC#A along with the decrease of the pitch length of CLC#B are qualitatively simulated and investigated. The results indicate that the above optical properties of the BLCPFs depend on the LC birefringence and pitch lengths of CLC#A and CLC#B layers. The concept of fabrication method of the BLCPFs by using polymerizable CLCs and thin films of poly(vinylalcohol) or photoalignment materials is discussed. They have potential practical applications in functional color filters, asymmetrical transmission systems, etc., owing to the multiple reflection bands of BLCPFs. Moreover, the BLCPFs, which can enhance the color gamut and light-utilization efficiency of light sources/LC displays, are reported herein.

scholarly journals High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aumber Abbas ◽  
Tanveer A. Tabish ◽  
Steve J. Bull ◽  
Tuti Mariana Lim ◽  
Anh N. Phan
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Low Cost ◽  
Graphene Quantum Dots ◽  
Cost Effective ◽  
Renewable Resource ◽  
Microwave Treatment ◽  
High Yield ◽  
Biomass Waste ◽  
Practical Applications

AbstractGraphene quantum dots (GQDs), a novel type of zero-dimensional fluorescent materials, have gained considerable attention owing to their unique optical properties, size and quantum confinement. However, their high cost and low yield remain open challenges for practical applications. In this work, a low cost, green and renewable biomass resource is utilised for the high yield synthesis of GQDs via microwave treatment. The synthesis approach involves oxidative cutting of short range ordered carbon derived from pyrolysis of biomass waste. The GQDs are successfully synthesised with a high yield of over 84%, the highest value reported to date for biomass derived GQDs. As prepared GQDs are highly hydrophilic and exhibit unique excitation independent photoluminescence emission, attributed to their single-emission fluorescence centre. As prepared GQDs are further modified by simple hydrothermal treatment and exhibit pronounced optical properties with a high quantum yield of 0.23. These modified GQDs are used for the highly selective and sensitive sensing of ferric ions (Fe3+). A sensitive sensor is prepared for the selective detection of Fe3+ ions with a detection limit of as low as 2.5 × 10–6 M. The utilisation of renewable resource along with facile microwave treatment paves the way to sustainable, high yield and cost-effective synthesis of GQDs for practical applications.

scholarly journals Advances in quantum light emission from 2D materials

Nanophotonics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 2017-2032 ◽  
Author(s):  
Chitraleema Chakraborty ◽  
Nick Vamivakas ◽  
Dirk Englund
Keyword(s):  
Optical Properties ◽  
Binding Energy ◽  
Momentum Space ◽  
Recent Progress ◽  
Light Emission ◽  
2D Materials ◽  
Two Dimensional ◽  
Theoretical Understanding ◽  
Practical Applications ◽  
Spin Properties

AbstractTwo-dimensional (2D) materials are being actively researched due to their exotic electronic and optical properties, including a layer-dependent bandgap, a strong exciton binding energy, and a direct optical access to electron valley index in momentum space. Recently, it was discovered that 2D materials with bandgaps could host quantum emitters with exceptional brightness, spectral tunability, and, in some cases, also spin properties. This review considers the recent progress in the experimental and theoretical understanding of these localized defect-like emitters in a variety of 2D materials as well as the future advantages and challenges on the path toward practical applications.

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