The threshold energy for electron irradiation damage in single-crystal graphite

1977 ◽  
Vol 35 (5) ◽  
pp. 1425-1428 ◽  
Author(s):  
R. F. Egerton
1984 ◽  
Vol 23 (Part 1, No. 3) ◽  
pp. 302-307 ◽  
Author(s):  
Masafumi Yamaguchi ◽  
Chikao Uemura ◽  
Akio Yamamoto ◽  
Atsushi Shibukawa

2007 ◽  
Vol 367-370 ◽  
pp. 451-456 ◽  
Author(s):  
Chaitanya S. Deo ◽  
Maria A. Okuniewski ◽  
Srinivasan G. Srivilliputhur ◽  
Stuart A. Maloy ◽  
Mike I. Baskes ◽  
...  

1991 ◽  
Vol 179-181 ◽  
pp. 526-528 ◽  
Author(s):  
Jiguang Sun ◽  
Jiapu Qian ◽  
Zhuoyong Zhao ◽  
Jiming Chen ◽  
Zengyu Xu

Crystals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 609 ◽  
Author(s):  
Muhammad Zeb ◽  
Muhammad Tahir ◽  
Fida Muhammad ◽  
Suhana Mohd Said ◽  
Mohd Faizul Mohd Sabri ◽  
...  

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.


2020 ◽  
Vol 49 (4) ◽  
pp. 263-268
Author(s):  
S. M. Asadov ◽  
S. N. Mustafaeva ◽  
V. F. Lukichev

1977 ◽  
Vol 64 (1-2) ◽  
pp. 157-166 ◽  
Author(s):  
W.J Yang ◽  
R.A Dodd ◽  
G.L Kulcinski

1998 ◽  
Vol 540 ◽  
Author(s):  
M.A. stevens Kalceff ◽  
M.R. Phillips ◽  
M. Toth ◽  
A.R. Moon ◽  
D.N. Jamieson ◽  
...  

AbstractCathodoluminescence (CL) microanalysis (spectroscopy and microscopy) in an electron microscope enables both pre-existing and irradiation induced local variations in the bulk and surface defect structure of wide band gap materials to be characterized with high spatial (lateral and depth) resolution and sensitivity. CL microanalytical techniques allow the in situ monitoring of electron irradiation induced damage, the post irradiation assessment of damage induced by other energetic radiation, and the investigation of irradiation induced electromigration of mobile charged defect species. Electron irradiated silicon dioxide polymorphs and MeV H+ ion implanted Type Ila diamond have been investigated using CL microanalytical techniques.


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