Semiconductor microcavities can exhibit various macroscopic quantum phenomena, including Bose-Einstein condensation of polaritons, Bardeen-Cooper-Schrieffer (BCS) states and photon lasing (lasing with negligible Coulombic exciton effects). An important aspect possible experimental identification these is a gap in the excitation spectrum (the BCS case polaritonic state). Similar to gap, light-in...

Lasers with injected spin-polarized carriers show an outstanding performance in both static and dynamic operation. In addition to the intensity response of conventional lasers, without carriers, polarization light can be exploited for optical communication spin-lasers. However, dynamics spin-lasers under amplitude modulation has been largely overlooked. Here, we reveal, analytically numerically...

the desire to achieve cosmetic rejuvenation and reduce effects of aging and photodamage urged scientists to develop effectual techniques which have minimal side effects and impressive long-term efficacy. traditional ablative resurfacing laser therapy has been used for several years;however, it has harmful side effects on the patient’s skin such as dyspigmentation, persistent erythema, infection...

introduction :the aim of this study was to evaluate and compare the in vitro effect of the erbium-doped yttrium aluminum garnet (er:yag) laser with different radiation distances and high-speed rotary treatment on the shear bond strength of flowable composite to enamel of human permanent posterior teeth . methods : freshly extracted human molar teeth with no caries or other surface defects were ...

introduction: diode laser irradiation has recently shown promising results for treatment of gingival pigmentation. this study sought to compare the efficacy of 2 diode laser irradiation protocols for treatment of gingival pigmentations, namely the conventional method and the sieve method. methods: in this split-mouth clinical trial, 15 patients with gingival pigmentation were selected and their...