Laser and nano-holes experiment

In summary, the "Laser and nano-holes experiment" investigates the interaction between laser light and materials featuring nano-sized holes. The experiment aims to understand how laser energy can be manipulated through these tiny structures to enhance light absorption and control photon behavior. Findings suggest potential applications in optical devices, energy harvesting, and advanced sensing technologies, highlighting the significance of nano-engineering in modern photonics.
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James_AA
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TL;DR Summary
An optical experiment is proposed to validate points
Hi everyone, let me propose an experiment to see if you agree with my points. There is a 1cm2 1-micron thick aluminum substrate with a matrix of 100x100 nano-holes each with 100x100nanometers cross section separated by 100nanometers. Then, we focus a 1W laser with visible wavelength:
drawing.jpg

1- UNDETECTABLE:

The matrix of nan-holes is equivalent to a square of 10,000x10,000nm which is a surface of 1E08nm2 = 1E-010m2

The 1W laser produces 1J per second which is 1 kg⋅m2⋅s−3 in the calculated surface of 1E-010m2 equals to 1E-010J= 0.1 nanowatts.

So, even assuming total transmission, such 0.1 nanowatts are undetectable by conventional high sensitivity optical power sensors (normally, 10nW minimum detectable power).

2-ALTERANTIVE:

A 5W laser is used for non-industrial laser cutting so to avoid burning the 1-micron substrate, 1W was chosen. However, even increasing the power to 4W would still make it undetectable. A solution could be using a 100W high power LED plus some lenses. Or even the following 1,500W LED:

[Spammy link deleted by the Mentors]

3-POINTLESS:

Being nano-holes at the subwavelength scale of light, no optical transmission is posible.

So, thanks for reading and let me know your thoughts.
 
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  • #2
James_AA said:
TL;DR Summary: An optical experiment is proposed to validate points

Being nano-holes at the subwavelength scale of light, no optical transmission is posible.
Where did you get that idea from? The attenuation of a small hole increases with size but it is never complete.
James_AA said:
TL;DR Summary: An optical experiment is proposed to validate points

The 1W laser produces 1J per second which is 1 kg⋅m2⋅s−3
and could you walk me through that one?
 
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  • #3
James_AA said:
TL;DR Summary: An optical experiment is proposed to validate points

Hi everyone, let me propose an experiment to see if you agree with my points. There is a 1cm2 1-micron thick aluminum substrate with a matrix of 100x100 nano-holes each with 100x100nanometers cross section separated by 100nanometers. Then, we focus a 1W laser with visible wavelength:
Your array only spans (100* 200nm) = 20 microns, not 1 cm, so your disk is mostly solid and nontransmissive. What area of the disk is illuminated by your 'focused' laser beam? What "optical experiment" are you proposing, and what "points" are you trying to validate?
 

FAQ: Laser and nano-holes experiment

What is the purpose of the laser and nano-holes experiment?

The purpose of the laser and nano-holes experiment is to investigate the interaction between laser light and nanoscale holes in a material. This can help in understanding phenomena such as light diffraction, plasmonic effects, and the enhancement of optical signals at the nanoscale. These insights are crucial for applications in fields like photonics, sensing, and materials science.

How are nano-holes created in the material?

Nano-holes are typically created using advanced lithographic techniques such as electron beam lithography, focused ion beam milling, or nanoimprint lithography. These methods allow for precise control over the size, shape, and distribution of the nano-holes on the material's surface.

What types of materials are used in the laser and nano-holes experiment?

Common materials used in these experiments include metals like gold and silver, as well as dielectric materials such as silicon and glass. The choice of material depends on the specific objectives of the experiment, such as the desired optical properties and compatibility with fabrication techniques.

What kind of lasers are typically used in these experiments?

The type of laser used can vary depending on the experiment's requirements. Commonly used lasers include continuous wave (CW) lasers and pulsed lasers, with wavelengths ranging from ultraviolet to infrared. The choice of laser depends on factors such as the material being studied, the size of the nano-holes, and the specific optical phenomena being investigated.

What applications can benefit from the findings of the laser and nano-holes experiment?

Applications that can benefit from these findings include optical sensors, photonic devices, and enhanced spectroscopy techniques. For example, nano-holes can be used to create highly sensitive biosensors, improve the efficiency of light-emitting devices, and enable advanced imaging techniques in scientific research and medical diagnostics.

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