Shehan Perera

18 Questions 13 Answers 0 Followers

Questions related from Shehan Perera

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?

03 March 2018 1,994 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....

11 November 2017 9,061 24 View

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

in power generation (say heat to electricity) the highest efficient system not always provide the high throughput and vise versa. in this scenario is there any rational way of deciding what...

07 July 2017 538 4 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?

07 July 2017 9,377 3 View

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

The dye should absorb 1 micron to 2 micron (near to mid infrared) Range. Not for solar application.

06 June 2017 3,075 2 View

What is Gaussian Schell-model source?

Optics

10 October 2016 5,090 0 View

What is fresnel entropy?

Electromagnetic, information theory

09 September 2016 2,556 0 View

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

Nano particles are incorporated into various layers of thin film solar cells. near field enhancement is one way of increasing the photon absorption in the active layer. Can anybody explain to me...

01 January 2016 9,093 4 View

Is it possible to phonon-photon interaction in solids?

phonon-photon interaction ( collision or heat transfer in between photons and phonons)

09 September 2015 6,186 0 View

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

Fabrication cost of different nano-particles ( specially metal) with different shapes (sphere, cube, prism. etc) and different structure such as core and shell. I am concern about nano-particles...

06 June 2015 905 5 View

What are the best methods to get uniformly dispersed nano particles (ex-metal) in a coating (ex- polymer) fabricated by R2R method?

R2R method, uniformly dispersed, nano particles

05 May 2015 3,254 7 View

Is there a way of incorporating nanoparticle assembly techniques such as Langmuir-Blodgett (LB) in roll-to-roll manufacturing?

Roll to Roll, nano particle assembly techniques

05 May 2015 9,342 1 View

What are the resent industrial applications of spin coating?

Spin coating, industry

05 May 2015 7,374 2 View

Is there any non-vacuum method to fabricate 10nm thick metal film?

Thin films, nano fabrications

04 April 2015 3,876 5 View

What is the difference in efficiency in c-Si solar cells with and without surface texturization?

04 April 2015 4,671 3 View

How many times can we reuse anodic aluminum oxide masks?

Nano-fabrication. AAO masks, nano particles, nano templates,

04 April 2015 288 1 View

What are the methods other than PVD and CVD to fabricate thin metal films?

metal nano particles, metal thin films

04 April 2015 7,889 8 View

What are the obstacles to using 'scanning techniques' such as laser nano patterning to fabricate larger areas required by industrial applications?

Laser micro/nano fabrication

03 March 2015 2,874 3 View