Is there a thorough Thermodynamic analysis of radiation emitted from finite size objects?

It is well known that finite size objects can emit radiation beyond the Planck ( or black body) limit. Is there a good thermodynamic base explanation for this phenomenon?

02 March 2018 1,886 1 View

What are the units of intensity of a laser beam?

What are the units of intensity of a laser beam? as an example say Gaussian laser beam. is it W/m2? in some document they have stated this as " irradiance" Then in that case units of W/m2 is ok....

10 November 2017 8,951 24 View

Is it possible to exceed the mean occupation number ( number of photons per mode) of black-body radiation?

Boltzmann distribution determines the expected occupancy of the modes in thermal equilibrium. Are there any passive ways of increasing the occupancy number?

06 July 2017 9,244 3 View

What is the rationale method for deciding whether going for high efficiency or high throughput in power generations?

06 July 2017 465 4 View

Anybody know a good dye that can absorb about 1 micron to 2 micron range to be used in Dye-Sensitized Cells?

05 June 2017 2,989 2 View

What is fresnel entropy?

08 September 2016 2,474 0 View

How does the enhanced near-field due to nanoparticles increase the absorption in the semiconductor?

31 December 2015 8,994 4 View

Is it possible to phonon-photon interaction in solids?

08 September 2015 6,111 0 View

What are the factors that determine (decide) the fabrication cost of different nano-particles?

05 June 2015 824 5 View

What are the resent industrial applications of spin coating?

04 May 2015 7,281 2 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How to resolve Gaussian error termination " Error termination via Lnk1e in F:\G16W\l103.exe" for TS(QST3)?

When I run the job for TS(QST3) in gaseous phase, it was completed without any error. But when I add water in CPCM model it terminated with an error: Inconsistency: ModMin= 2 Eigenvalue=...

21 February 2021 3,198 2 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How to calculate the Atomic Polar Tensor using DFT ?

Dear friends, I am a beginner at DFT calculation. I have done a structure optimization using DFT- B3LYP/6-31G*, Nevertheless, I don't know How to calculate the Atomic Polar Tensor (APT) in...

17 February 2021 9,082 3 View

Access to supercomputer resources in India?

Hello everyone, I want to perform some gaussian calculations and want to use Materials studio for my research work. Can anyone guide me how to get access to supercomputer resources in India for...

15 February 2021 8,264 3 View

Why we use feature normalization before using the Gaussian kernel in SVM?

Support vector machine

09 February 2021 6,405 3 View

Does Gaussian 09W software take too long to give a result if we have a large chemical structure ?

DFT - gaussviev - gaussian09W - HOMO - LUMO

08 February 2021 6,012 5 View

How to calculate enthalpy of formation of Polymers taking into account the terminal end groups?

I am trying to find methods for theoretical calculation of enthalpy of formation of Polymers. till now I have found the oligomeric method (Gaussian) which uses the extrapolation of results from...

05 February 2021 9,707 4 View