![cmditr](/img/default-banner.jpg)
- Видео 82
- Просмотров 1 959 583
cmditr
Добавлен 28 сен 2007
Videos produced by the Center for Materials and Devices for Information Technology Research, NSF DMR 0120967
REU Mentor Training- Hooked on Photonics
Basic orientation for graduate student mentors who will be working with undergraduates in the photonics research labs.
Просмотров: 764
Видео
CdSe Nanocrystal Synthesis
Просмотров 18 тыс.12 лет назад
This video shows the synthesis of CdSe nanocrystals using the hot injection method. Nanocyrstals are used to adjust the light emission in LEDs and absorption in organic photovoltaics. For More information see photonicswiki.org/index.php?title=Cadmium_Selenide_Nanocrystal_Synthesis
Phase Modulator Device Fabrication
Просмотров 12 тыс.12 лет назад
This shows the fabrication and testing of a phase modulator similar in principle to a Mach-Zehnder interferometer which incorporates an electro-optical polymer in a channel. More information see photonicswiki.org/index.php?title=Mach-Zehnder_Device
Physical Vapor Deposition
Просмотров 46 тыс.12 лет назад
Physcial Vapor Deposition (PVD) is a technique for apply thin layers of chemicals on substrates by vaporizing them with heat in a vacuum chamber. For more information see photonicswiki.org/index.php?title=Physical_Vapor_Deposition_PVD_-_Vacuum/thermal_coater
Lead Sulfide Quantum Dots Synthesis
Просмотров 41 тыс.12 лет назад
Quantum dots are semiconductor nanocrystals on the scale of a few nanometers, or several hundred atoms. At this size quantum effects dominate and the electrons are quantum confined to narrow energy levels determined by the size of the particle. This means that the absorption wavelength the light can be fine-tuned and that quantum dots can be used to adjust the bandgap of the materials they are ...
Silver Nanoprisms Synthesis
Просмотров 58 тыс.12 лет назад
Nanoprisms are used to adjust color of chemical systems they are mixed with for example in organic photovoltaic devices. The size of the nanoprisms determines the absorption wavelength. This shows the synthesis of silver nanocrystals at a professional chemistry laboratory at University of Washington. This procedure should not be attempted without laboratory safety provisions. For more informati...
External Quantum Efficiency
Просмотров 17 тыс.12 лет назад
External Quantum Efficiency (EQE) for a photovoltaic device is the number of extracted free charge carriers per incident photon. This ratio is obtained by measuring the photocurrent spectrum of the photovoltaic device under test and comparing it to the photocurrent spectrum of a calibrated photodetector, thereby removing the spectral characteristics of the test system. This video describes the ...
Variable Angle Spectroscopic Ellipsometry
Просмотров 17 тыс.12 лет назад
An elipsometer is used measure the dielectric properties (including refractive index and dielectric function) of thin films. For more information see the photonics wiki: photonicswiki.org/index.php?title=Ellipsometer
Femtosecond Z-Scan Spectroscopy
Просмотров 25 тыс.12 лет назад
The Femtosecond Z-Scan Spectrometer is used to measure extremely fast non-linear absorption and non-linear refraction. This is used to estimate the electro-optic coefficient and Kerr non-linearity. For more information see Photonics Wiki photonicswiki.org/index.php?title=Femtosecond_Z-Scan_Spectrometer
Photovoltaic characterization with probeware
Просмотров 2,1 тыс.12 лет назад
This is a simple lab that can be done in a high school classroom. It produces a current voltage curve which is the only way to accurately measure the performance of solar cell. For more information see photonicswiki: photonicswiki.org/index.php?title=PV_Characterization_Lab
Attenuated Total Reflection (ATR)
Просмотров 10 тыс.12 лет назад
Attenuated Total Reflection or ATR is a technique used together with Teng Mann to measure the R33 of electro-optic materials. A beam of IR light is directed through a prism at an angle exceeding the critical angle for internal reflection. This produces an evanescent wave at the prism surface. If a EO polymer is pressed in intimate contact with the prism they can be coupled so that he evanescent...
Teng-Man Method
Просмотров 1,7 тыс.12 лет назад
The Teng - Man method can measure R33 as the sample is being poled. R33 is an elipsometric measurement[1]. A poling voltage is applied to the film while making the elipsometric measurements and looking for changes in the AC signal generated by incident light. (This video is the replacement for the same title which was formerly split into two parts.) More information on the CMDITR wiki: photonic...
Raman Microscope
Просмотров 65 тыс.12 лет назад
The Raman microscope is an optical microscope through which a monochromatic laser source is directed at a sample. It is an sensitive spectroscopic technique which allows you to no destructively identify microscopic samples. For more information see Photonicswiki photonicswiki.org/index.php?title=Raman_microscope
Laser Mask Writer
Просмотров 9 тыс.13 лет назад
The Heidleburg micro PG laser pattern generator is used to create masks for photoetching of substrates with features down to 3 microns. For more information see Photonicswiki photonicswiki.org/index.php?title=Laser_Mask_Generator
Magnetron Sputter Coater
Просмотров 47 тыс.13 лет назад
This shows how the magnetron sputter coater is used to apply thin coatings on glass or silicon for research purposes. More info at photonicswiki.org/index.php?title=Magnetron_Sputtering_Coater
RCR Whistleblower: Scene 3 - Clean data
Просмотров 27713 лет назад
RCR Whistleblower: Scene 3 - Clean data
RCR Whistleblower: Scene 2- Seek Help
Просмотров 27213 лет назад
RCR Whistleblower: Scene 2- Seek Help
OFET Fabrication and Characterization
Просмотров 21 тыс.13 лет назад
OFET Fabrication and Characterization
Femtosecond Pump-Probe Spectroscopy
Просмотров 72 тыс.13 лет назад
Femtosecond Pump-Probe Spectroscopy
Fourier Transform Infrared (FTIR) Spectroscopy
Просмотров 88 тыс.13 лет назад
Fourier Transform Infrared (FTIR) Spectroscopy
Nuclear Magnetic Resonance Spectroscopy (NMR)
Просмотров 85 тыс.13 лет назад
Nuclear Magnetic Resonance Spectroscopy (NMR)
If i could only click on the 'Like' button a zillion times i would 👌. Excellent video on the modulator
How to know? it is 2 photon or one photon absorption? For powder sample which way we will get good result? With the liquid form or making a film on glass substrate?
Can anyone answer my question please I am synthesizing same particles but I don’t have BSPP reagent what are the alternatives? Thanks
Thank you!
nice
thank you very much. it is really helpful
12 years ago. PbS and PbSe would have very strong resonance in the reddish orange to near IR bands. (580 to about 2000nm wavelengths) Also they would be reasonably air stable as well.❤
What is sulphure source?
Profesor, ¿cual es la tasa de repetición del láser?
Have you used iron inside your coil 🙄
thanks, good job, how i can convert micro joule into GW/cm2
amazing lecture.. grattitutde
That was fantastic! Thank you for sharing! from 1 decade ago.
Rofea Optoelectronics offers a product line of commercial Electro-optic modulators, Phase modulators, Intensity modulator, Photodetectors, Laser light sources, DFB lasers,Optical amplifiers, EDFA, SLD laser, QPSK modulation, Pulse laser, Light detector, Balanced photodetector, Laser driver, Fiber optic amplifier, Optical power meter, Broadband laser, Tunable laser, Optical detector, Laser diode driver, Fiber amplifier. We also provide many particular modulators for customization, such as 1*4 array phase modulators, ultra-low Vpi, and ultra-high extinction ratio modulators, primarily used in universities and institutes. Hope our products will be helpful to you and your research.
Wow 12y ago
Now it's 13
Each video is amazing and instructive! Thank you so much.
Like your videos so much. Very helpful.
Excelente vídeo. Obrigado.
When you understand the science behind this you really appreciate how amazing and versatile the software is at modelling and fitting the optical parameters and thickness of almost any thin film sample you can throw at it
can someone plz explain why excited state absorption was positive?
so cool this channel...
Excellent tutorial
UMW
BSPP solution was not identified and did you run a control of the LED light exposure at the same temperature the LED put out in the aluminum wrapped samples???
Great explanation of PVD
👍
great explanation❤
I actually was accused of industrial espionage when as a 17 high school student when we actually toured a major pharmaceutical facility in my town. We were taken to the corporate library where they actually had books on NMR and I had been fascinated with the idea since reading an article in Scientific American actually published in 1959. I was so into reading those books the class actually left me behind for an hour before security actually came and questioned me about my interest. That was 55 years ago but the subject still resonates with me.
Hello, I have recently joined as Technical Assistant at a university in India with a TEM facility. I need some of your suggestions for proper handling and its operation
plz help me to find a postdoc
Thank you for the amazing demo!
Cool video to get a practical idea of the PVD process. Thank you!
She probably stole everything she could and gave it to the CCP
Пишу проект по биологии... Одним словом: них*я не понял, но очень интересно!
Hi! Example; If I have an old chip that no longer exists anywhere even on the internet to buy, can I reproduce that chip with E-beam lithography? Or recover it? Or can I not? First you have to decapsulate that chip and then you take the chip's DIE and insert it into the lithography machine? and is that ok?
Great video, sir can you upload more videos related to OFET? Really it is very helpful.
Does the material coat everything in the chamber? I'm assuming so, is there any way to focus deposition only on the substrate?
How to analyze the data from the software.
How to analyze the data from the software.
جميل
Bunyi video tidak bagus
How to synthesis CdSe@rGo by coprecipetaion method?
Thank you sir
hey, can you make a video on EPR simulation by simfonia software, please?
Came here from Applied Science 💪🏻😁
I'm here from "Applied Science".
come back
Applied Science is the best youtuber to ever exist
Useful video. Thank you so much.