Giant optical gain in a single-crystal erbium chloride silicate nanowire

2017 ◽  
Vol 11 (9) ◽  
pp. 589-593 ◽  
Author(s):  
Hao Sun ◽  
Leijun Yin ◽  
Zhicheng Liu ◽  
Yize Zheng ◽  
Fan Fan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Optical Gain ◽  
Erbium Chloride

Record-High Optical Gain in a Single Crystal Erbium Chloride Silicate Nanowire at 1532 nm

2016 ◽  
Author(s):  
Hao Sun ◽  
Zhicheng Liu ◽  
Xue Feng ◽  
Yize Zheng ◽  
Yongzhuo Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Optical Gain ◽  
Erbium Chloride

scholarly journals Amplified Spontaneous Emission and Optical Gain in Organic Single Crystal Quinquethiophene

Crystals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 609 ◽  
Author(s):  
Muhammad Zeb ◽  
Muhammad Tahir ◽  
Fida Muhammad ◽  
Suhana Mohd Said ◽  
Mohd Faizul Mohd Sabri ◽  
...  
Keyword(s):  
Single Crystal ◽  
Spontaneous Emission ◽  
Threshold Energy ◽  
Pump Energy ◽  
Optical Gain ◽  
Amplified Spontaneous Emission ◽  
Stimulated Emission ◽  
Excitation Wavelength ◽  
Optical Amplification ◽  
Organic Single Crystal

In this paper, we report optical characteristics of an organic single crystal oligomer 5,5⁗-diphenyl-2,2′:5′,2″:5″,2‴:5‴,2⁗-quinquethiophene (P5T). P5T crystal is a thiophene/phenylene co-oligomer that possesses better charge mobility as well as photoluminescence quantum efficiency (PLQE) as compared to other organic materials. Stimulated emission in P5T is investigated via amplified spontaneous emission (ASE) measurements within broad pump energies ranging from 35.26 to 163.34 µJ/cm2. An Nd-YAG femtosecond-tunable pulsed laser is used as a pump energy source for the ASE measurements of P5T crystals at an excitation wavelength of 445 nm. The ASE spectra exhibit optical amplification in P5T crystals at a 625 nm peak wavelength with a lower threshold energy density (Eth) ≈ 52.64 μJ/cm2. P5T also demonstrates higher optical gain with a value of 72 cm−1, that is calculated by using the variable stripe-length method. The value of PLQE is measured to be 68.24% for P5T. This study proposes potential applications of P5T single crystals in organic solid state lasers, photodetectors, and optical amplifiers.

Long lifetime, high density single-crystal erbium compound nanowires as a high optical gain material

2012 ◽  
Vol 100 (24) ◽  
pp. 241905 ◽  
Author(s):  
Leijun Yin ◽  
Hao Ning ◽  
Sunay Turkdogan ◽  
Zhicheng Liu ◽  
Patricia L. Nichols ◽  
...  
Keyword(s):  
Single Crystal ◽  
Optical Gain ◽  
High Density ◽  
Gain Material ◽  
Long Lifetime

Single-crystal erbium chloride silicate nanowires as a novel Si-compatible source at 1.53 µm

2011 ◽  
Author(s):  
A.L. Pan ◽  
L. J. Yin ◽  
Z.C. Liu ◽  
M.H. Sun ◽  
P. L. Nichols ◽  
...  
Keyword(s):  
Single Crystal ◽  
Erbium Chloride

Single-Crystal Erbium Chloride Silicate Nanowires for Novel Si-Compatible Sources at 1.53 μm

2011 ◽  
Author(s):  
A. L. Pan ◽  
L. J. Yin ◽  
Z. C. Liu ◽  
M. H. Sun ◽  
P. L. Nichols ◽  
...  
Keyword(s):  
Single Crystal ◽  
Erbium Chloride

Single-crystal erbium chloride silicate nanowires as a Si-compatible light emission material in communication wavelength

2011 ◽  
Vol 1 (7) ◽  
pp. 1202 ◽  
Author(s):  
Anlian Pan ◽  
Leijun Yin ◽  
Zhicheng Liu ◽  
Minghua Sun ◽  
Ruibin Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Light Emission ◽  
Erbium Chloride

A Preparation of High Resolution Standards for Electron Microscopy. Part II

1971 ◽  
Vol 29 ◽  
pp. 160-161
Author(s):  
Akira Tanaka ◽  
David F. Harling
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Carbon Black ◽  
Single Crystal ◽  
Dark Field ◽  
Graphitized Carbon Black ◽  
Graphitized Carbon ◽  
Dark Field Imaging ◽  
Crystal Films ◽  
Micro Holes

In the previous paper, the author reported on a technique for preparing vapor-deposited single crystal films as high resolution standards for electron microscopy. The present paper is intended to describe the preparation of several high resolution standards for dark field microscopy and also to mention some results obtained from these studies. Three preparations were used initially: 1.) Graphitized carbon black, 2.) Epitaxially grown particles of different metals prepared by vapor deposition, and 3.) Particles grown epitaxially on the edge of micro-holes formed in a gold single crystal film.The authors successfully obtained dark field micrographs demonstrating the 3.4Å lattice spacing of graphitized carbon black and the Au single crystal (111) lattice of 2.35Å. The latter spacing is especially suitable for dark field imaging because of its preparation, as in 3.), above. After the deposited film of Au (001) orientation is prepared at 400°C the substrate temperature is raised, resulting in the formation of many square micro-holes caused by partial evaporation of the Au film.

Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

1970 ◽  
Vol 28 ◽  
pp. 456-457
Author(s):  
L. E. Murr ◽  
G. Wong
Keyword(s):  
Single Crystal ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
High Rate ◽  
Flash Evaporation ◽  
Optimum Load ◽  
Single Crystal Films ◽  
Crystal Films ◽  
A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

Dislocations, Ordering and Antiferromagnetic Domains in MnO

1970 ◽  
Vol 28 ◽  
pp. 522-523
Author(s):  
D. J. Barber ◽  
R. G. Evans
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
Optical Microscopy ◽  
Defect Chemistry ◽  
Magnetic Structures ◽  
Optically Transparent ◽  
Magnetic Features ◽  
Antiferromagnetic Domains

Manganese (II) oxide, MnO, in common with CoO, NiO and FeO, possesses the NaCl structure and shows antiferromagnetism below its Neel point, Tn∼ 122 K. However, the defect chemistry of the four oxides is different and the magnetic structures are not identical. The non-stoichiometry in MnO2 small (∼2%) and below the Tn the spins lie in (111) planes. Previous work reported observations of magnetic features in CoO and NiO. The aim of our work was to find explanations for certain resonance results on antiferromagnetic MnO.Foils of single crystal MnO were prepared from shaped discs by dissolution in a mixture of HCl and HNO3. Optical microscopy revealed that the etch-pitted foils contained cruciform-shaped precipitates, often thick and proud of the surface but red-colored when optically transparent (MnO is green). Electron diffraction and probe microanalysis indicated that the precipitates were Mn2O3, in contrast with recent findings of Co3O4 in CoO.

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