Optical transistor made from a single molecule

Zurich, Switzerland - Engineers are one step closer to developing an optical computer, following the successful creation of an optical transistor from a single molecule.

A research group at ETH Zurich has achieved something of a breakthrough by making use of the fact that a molecule’s energy is quantized: when laser light strikes a molecule that is in its ground state, the light is absorbed. As a result, the laser beam is quenched.

Conversely, it's possible to release the absorbed energy again in a targeted way with a second light beam. This occurs because the beam changes the molecule’s quantum state, with the result that the light beam is amplified.

The ETH Zurich scientists have now been able to generate stimulated emission using just one molecule. They were helped in this by the fact that, at low temperatures, molecules seem to increase their apparent surface area for interaction with light. The researchers therefore needed to cool the molecule down to minus 272 degrees Celsius - not particularly practical for everyday use, admittedly, but a big step forward nevertheless.

By using one laser beam to prepare the quantum state of a single molecule in a controlled fashion, scientists could significantly attenuate or amplify a second laser beam. This mode of operation is identical to that of a conventional transistor, in which electrical potential can be used to modulate a second signal.

Thus, the new single molecule transistor could also pave the way for a quantum computer. Vahid Sandoghdar, Professor at the Laboratory of Physical Chemistry of ETH Zurich, said, “Many more years of research will still be needed before photons replace electrons in transistors. In the meantime, scientists will learn to manipulate and control quantum systems in a targeted way, moving them closer to the dream of a quantum computer.”

Source: TG Daily

Tags: technologies

Comments
Add comment

Your name:
Sign in with:
or
Your comment:


Enter code:

E-mail (not required)
E-mail will not be disclosed to the third party


Last news

 
Google’s voice assistant platform has been known as Google Now
 
The SanDisk 1TB SD card prototype represents another significant achievement as growth of high-resolution content
 
Microsoft is developing a new “Skype for Life” client
 
Siri on the Mac is new, and is similar to that on the iOS
 
The latency in this test was supposedly no more than 2 milliseconds
 
Apple has made to the iPhone 7/7 Plus is by making the home button a solid state button
 
Android Nougat should eventually extend back to the Galaxy S6 generation
 
You’re not supposed to expose the iPhone to water anyway
Samsung Galaxy TabPro S - a tablet with the Windows-keyboard
The first Windows-tablet with the 12-inch display Super AMOLED
June 7, 2016 /
Keyboards for iOS
Ten iOS keyboards review
July 18, 2015 /
Samsung E1200 Mobile Phone Review
A cheap phone with a good screen
March 8, 2015 / 4
Creative Sound Blaster Z sound card review
Good sound for those who are not satisfied with the onboard solution
September 25, 2014 / 2
Samsung Galaxy Gear: Smartwatch at High Price
The first smartwatch from Samsung - almost a smartphone with a small body
December 19, 2013 /
HP Slate 7 is a 7-inch Android 4 Tablet PC with good sound
A cost-effective, 7-inch tablet PC from a renowned manufacturer
October 25, 2013 / 4
 
 

News Archive

 
 
SuMoTuWeThFrSa
    123
45678910
11121314151617
18192021222324
252627282930 




Poll

Do you like Windows 10?
or leave your own version in comments (32)