P.Hannaford - Femtosecond Laser Spectroscopy

... numerical method for simulation of focusing by VFZPs The 10 P Srisungsitthisunti, O K Ersoy, and X Xu, Volume Fresnel zone plates fabricated by femtosecond laser direct writing, ” Appl Phys Lett 90, ... and X Xu, Laser direct writing of volume modified Fresnel zone plates, ” J Opt Soc Am B 24, 2090–2096 (2007) Q Cao and J Jahns, “Comprehensive focusing analy...

Ngày tải lên: 06/05/2014, 08:53

... prominent effects of laser annealing were the improvement of the current saturation and the positive shift of the threshold voltage Vth Figure 2a shows the drain current versus drain-to-source voltage ... to control the switching threshold voltage of an inverter with the same gain at the switching threshold voltage (VM), or trip voltage, which will maxi...

Ngày tải lên: 06/05/2014, 08:53

... electron plasma, Fig shows the image of timeintegrated plasma radiation generated by a single pulse focused on the sample surface marked by the dashed white line The incident laser energy is 80 ␮J /pulse ... shrinkage of the laser beam diameter as shown in Fig The cumulative effect of defocusing and self-focusing results in the laser beam being focused behind the focal...

Ngày tải lên: 06/05/2014, 08:54

... modification such as ozone treatment and surface passivation.38 ’ CONCLUSIONS In conclusion, single In2O3 nanowire transistors in which the S-D regions are selectively annealed utilizing femtosecond laser ... the contacts, consequently lowering the ΦB along with increased electronic transparency of the contact region.37 The high peak intensity of the femtosecond laser can induce...

Ngày tải lên: 06/05/2014, 08:54

... heat-diffusion ZHANG et al Simulation of microscale densification during femtosecond laser processing of dielectric materials 947 FIGURE Temperature profile along the x direction (laser pulse energy 0.25 ... localized change of the index of refraction as compared with the laser- heated area 948 Applied Physics A – Materials Science & Processing Summary Femtosecon...

Ngày tải lên: 06/05/2014, 08:54

... is increased In this work, both experiments and numerical simulation of single pulse transmissivity are carried out to study how the ultrafast laser pulse is coupled into fused silica The initial ... dielectric constant of excited fused silica, and n = Reͱ␧ is the corresponding refractive index The first term on the righthand side ͑RHS͒ in Eq ͑2͒ stands for laser diffracti...

Ngày tải lên: 06/05/2014, 08:55

... Qiu and C L Tien, Heat Transfer Mechanisms during Short-Pulse Laser Heating of Metals, ASME J Heat Transfer, vol 115, pp 835–841, 1993 T Q Qiu and C L Tien, Femtosecond Laser Heating of Multi-Layer ... Ultrashort Laser Pulse Interactions with Metal Films, Numer Heat Transfer A, vol 40, pp 1–20, 2001 D Y Tzou and K S Chiu, Temperature-Dependent Thermal Lagging in Ultrafast...

Ngày tải lên: 06/05/2014, 08:55

... ͑2005͒ MECHANISMS OF DECOMPOSITION OF METAL DURING FIG 12 ͑a͒ Temperature and ͑b͒ pressure distributions at different time steps at laser fluence of 1.5 J / cm2 At a lower laser fluence of 0.25 ... and 14 165415-12 MECHANISMS OF DECOMPOSITION OF METAL DURING PHYSICAL REVIEW B 72, 165415 ͑2005͒ FIG 16 Positions of groups of atoms on T-␳ diagram at 45 ps at lase...

Ngày tải lên: 06/05/2014, 08:55

... electron plasma, Fig shows the image of timeintegrated plasma radiation generated by a single pulse focused on the sample surface marked by the dashed white line The incident laser energy is 80 ␮J /pulse ... shrinkage of the laser beam diameter as shown in Fig The cumulative effect of defocusing and self-focusing results in the laser beam being focused behind the focal...

Ngày tải lên: 06/05/2014, 08:58

... modification such as ozone treatment and surface passivation.38 ’ CONCLUSIONS In conclusion, single In2O3 nanowire transistors in which the S-D regions are selectively annealed utilizing femtosecond laser ... the contacts, consequently lowering the ΦB along with increased electronic transparency of the contact region.37 The high peak intensity of the femtosecond laser can induce...

Ngày tải lên: 06/05/2014, 08:58

... heat-diffusion ZHANG et al Simulation of microscale densification during femtosecond laser processing of dielectric materials 947 FIGURE Temperature profile along the x direction (laser pulse energy 0.25 ... localized change of the index of refraction as compared with the laser- heated area 948 Applied Physics A – Materials Science & Processing Summary Femtosecon...

Ngày tải lên: 06/05/2014, 08:58

... modified zone plates, as discussed previously In conclusion, we designed and fabricated volume phase and amplitude Fresnel zone plates inside fused silica by femtosecond laser direct writing These ... through volume zone plates We found out that the transmitted light of phase volume zone plates was constant, whereas the transmitted light of amplitude volume...

Ngày tải lên: 06/05/2014, 09:02

... growth of PbS nanoparticles inside a deep volume of porous silica monoliths Moreover, we provide a study on the stability of PbS nanoparticles as a function of time Experimental Porous silica ... diameter of the host silica matrix and the power of pulsed femtosecond laser irradiation play an important role in the stability of the obtained PbS nanop...

Ngày tải lên: 20/06/2014, 22:20

... results in increasing the number of pulses and hence decreases size of the generated magnetic nanofibers Increasing repetition rate of the femtosecond laser results in generating smaller size magnetic ... magnetic nanofibers The magnetic strength of the generated nanofibers can be controlled by changing the repetition rate of the femtosecond laser These ma...

Ngày tải lên: 21/06/2014, 03:20