IBM controls light speed

Light's speed can be slowed in dispersive materials. IBM scientists have successfully slowed light to 3.3% of its normal 186,000-miles/sec speed with a bit of silicon called a crystal waveguide. Researchers created waveguides with conventional chip-manufacturing processes by fabricating 200-mm silicon-on-insulator wafers with 2-µm-thick buried-oxide and 220-nm-thick silicon layer.

01/01/2006


Light's speed can be slowed in dispersive materials. IBM scientists have successfully slowed light to 3.3% of its normal 186,000-miles/sec speed with a bit of silicon called a crystal waveguide.

Researchers created waveguides with conventional chip-manufacturing processes by fabricating 200-mm silicon-on-insulator wafers with 2-

Using a 2-milliwatt heater with the waveguide, the scientists could also control light's speed effectively in about 100 nanoseconds. The light was slowed additionally by applying an electric field to the waveguide.

Pulses of "slow" light could carry data efficiently for all-optical storage and switching. Furthermore, the technology has the potential to allow computers to substitute light for electricity and run at terahertz speeds.

Historically optical components tended to be large and pricey—defying the economies of large-scale production. Some see the manufacture of optical components as much art as science.

A crystal waveguide would allow optical components to be scaled down resulting in significant cost savings. Moreover, manufacturing waveguides from silicon would allow a merging of the optics and the electronics on the same silicon chip. Nearly concurrently, another group of scientists announced a new silicon-based microtransmitter that can send optical data at 100 Gbps or 10% of a terahertz. www.ibm.com





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
Additive manufacturing benefits; HMI and sensor tips; System integrator advice; Innovations from the industry
Robotic safety, collaboration, standards; DCS migration tips; IT/OT convergence; 2017 Control Engineering Salary and Career Survey
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This article collection contains several articles on how automation and controls are helping human-machine interface (HMI) hardware and software advance.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me