scholarly journals Electrically pumped graphene-based Landau-level laser

2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Samuel Brem ◽  
Florian Wendler ◽  
Stephan Winnerl ◽  
Ermin Malic
2021 ◽  
Author(s):  
Erich Gornik ◽  
Gottfried Strasser ◽  
Karl Unterrainer
Keyword(s):  

2016 ◽  
Vol 30 (06) ◽  
pp. 1650024
Author(s):  
Solomon Getahun

We analyze electrically pumped atomic cavity coupled to a two-mode vacuum reservoirs via a single-port mirror whose open cavity contains N nondegenerate three-level cascade atoms. We carry out our analysis by putting the noise operators associated with a vacuum reservoir in normal order. It is found that unlike the mean photon number, the quadrature squeezing and the degree of entanglement do not depend on the number of atoms. This implies that the quadrature squeezing and the degree of entanglement of the cavity light do not depend on the number of photons. We have also shown that the light generated by the three-level laser is in a squeezed and entangled state, with maximum quadrature squeezing and degree of entanglement being 50%. Moreover, the mean photon number of the system in which the laser operating at threshold and above threshold does not depend on the spontaneous decay constant.


2009 ◽  
Vol 150 (2) ◽  
pp. 022059 ◽  
Author(s):  
Takahiro Morimoto ◽  
Yasuhiro Hatsugai ◽  
Hideo Aoki

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1135-C6-1137 ◽  
Author(s):  
R. A. Gordon ◽  
J. B. Frandsen
Keyword(s):  

Author(s):  
VARSHA PALLED ◽  
DR. JITENDRA RAO ◽  
DR. RAGHUWAR DAYAL SINGH ◽  
DR. SHUCHI TRIPATHI ◽  
DR. KALPANA SINGH ◽  
...  

The purpose of this study was to evaluate whether Low-Level Laser Therapy (LLLT) improves the healing of the implant surgical site with clinical and biochemical parameters.Thirty patients with an edentulous space spanning a single tooth were selected. The patients were randomly allocated to two groups - the control group and the test group. The test group received laser energy at a power of 2J/cm 2 with a total of 4-6J energy over each implant. Clinical parameters (Implant Stability Quotient, probing index, modified sulcus bleeding index)and osteoprotegerin (OPG) were assessed at baseline and follow-up intervals (2 weeks, 6 weeks, and 3 months).The test group showed significantly higher implant stability quotient compared to thecontrol group at 2 weeks(57.93±3.95 and 35.67±3.08; p<0.01) and 3months(58.86±3.75 and 67.06±3.78; p<0.01). A significant rise in OPG levels of the test group(686.30±125.36pg/ml at baseline and 784.25±108.30pg/ml at 3months;p<0.01) was seen contrary to significant decline in the control group (839.50±249.08pg/ml at baseline,415.30±78.39pg/ml at 3months;p<0.01). Within the limitations of the study, the study suggests that the healing of peri-implant hard and soft tissues may be enhanced with the use of LLLT as an explicit modality during the post-operative period.


2020 ◽  
Vol 69 (3) ◽  
Author(s):  
Paulo Esteves Pinto Faria ◽  
Astrid Temprano ◽  
Fábio Piva ◽  
Eduardo Sant'ana ◽  
Dênis Pimenta

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