Cool Giant Stars are Bigger at 712 nm than at 754 nm

Should bromoform absorb at wavelengths longer than 300 nm ?

A theoretical study of the low-lying singlet and triplet electronic states of CHBr3 is presented. Calculations of excitation energies and oscillator strengths are presented using excited state coupled cluster response methods, as well as the complete active space self-consistent field method with the full Breit–Pauli spin–orbit operator. These calculations predict that for CHBr3 there is only o...

Are Primary Quantum Yields of NO 2 Photolysis at λ ≤ 398 nm Smaller than Unity ?

Primary quantum yields Φ of NO2 photolysis at wavelengths λ # 398 nm and at bath gas pressures below 1 bar are analyzed. Stern-Volmer plots for collisional photolysis quenching, from experiments at pressures between 10 and 1000 bar, do not indicate a substantial reduction of the quantum yield below unity for pressures below 1 bar. The consequences of the recently discovered fluctuations of spec...

1064 nm Nd:YVO4 laser intracavity pumped at 912 nm and sum-frequency mixing for an emission at 491 nm.

We present for the first time a Nd:YVO(4) laser emitting at 1064 nm intracavity pumped at 912 nm by a Nd:GdVO(4) laser. We carried out a model to design the system properly, and laser performance was experimentally investigated. Intracavity sum-frequency mixing at 912 and 1064 nm was then realized in a BiBO crystal to reach the blue range. We obtained a cw output power of 155 mW at 491 nm with ...

Optical Absorption of Silicon Nitride Membranes at 1064 nm and at 1550 nm

Dual-band negative index metamaterial: double negative at 813 nm and single negative at 772 nm.

This work is concerned with the experimental demonstration of a dual-band negative index metamaterial. The sample is double negative (showing both a negative effective permeability and a negative effective permittivity) for linearly polarized light with a wavelength between 799 and 818 nm, and the real part of its refractive index is approximately -1.0 at 813 nm. The ratio of -Re(n)/Im(n) is cl...