Rockwell Collins : Patent Issued for Terahertz Laser (USPTO 9551619)

http://www.4-traders.com/ROCKWELL-COLLINS-INC-16723/news/Rockwell-Collins-Patent-Issued-for-Terahertz-Laser-USPTO-9551619-23804823/

By a News Reporter-Staff News Editor at Investment Weekly News -- Rockwell Collins, Inc. (Cedar Rapids, IA) has been issued patent number 9551619, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Brown, Robert G. (Tustin, CA); Stanley, James H. (Palo Alto, CA).

This patent was filed on September 23, 2011 and was published online on January 24, 2017.

From the background information supplied by the inventors, news correspondents obtained the following quote: "Lasers emitting in the THz frequency range of 0.1 to 10 THz are known. For example, U.S. Pat. Nos. 7,471,449, 7,508,578, 7,706,056, 7,430,074, and 7,440,178 to Korenblit and Tankhilevich describe magnon lasers which emit in the THz frequency range. In such magnon lasers, lasing is predicted to occur in a lasing medium of ferromagnetic semiconductor material involving spin-up and spin-down electrons in a classic 4 level sub-band laser structure [A E. Siegman, `Lasers`, University Science Books, 1986.]. The magnon lasing emission occurs for transitions between the upper two sub-band. Above a certain threshold, annihilating non-equilibrium magnons will lase and produce THz radiation, whose intensity depends on the magnon collision rate.

"Lasing is achieved by a balance between various length scales, the mean free path of electrons in the medium, the spin-wave wavelength, the sample dimensions, and the radiated wavelength. To lase, the ambient temperature must be below a critical temperature, where recent results have shown that with the right materials, the critical temperature may be as high as 850.degree. C. In a one hundred layer magnon laser incorporating semiconductor magnon mirrors, the CW (continuous wave) power can be increased 100-fold, and yet the device thickness may be less than 4 microns.

"Korenblit and Tankhilevich's own predictions for their CW magnon laser are for a threshold current exceeding 5000 Amps/cm.sup.2, and employing 10-100 Watts of input electrical power, where it might be possible to extract .about.10 mW of laser power for a single-stage laser and .about.1 Watt for a 100 stage laser. The required threshold current and input electrical power for output laser power exceeds other known solid-stage lasers for this wavelength range, where wavelengths should be in the 0.2 to 2.0 THz region, with a laser line width of .about.1 MHz.

"Moreover, currently most powerful THz emitters are relatively feeble. Cooled Quantum Cascade Lasers (QCL) lasers emit microWatts of power, with the best prospects being mW. The best research-level MMICs emit only 50 mW of power at 0.22 THz."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "According to one embodiment, there is provided a pulsed emitter of electromagnetic radiation having a frequency range of 0.1 to 10 THz, comprising: an electromagnetic radiation gain medium for generating electromagnetic radiation having the frequency range of 0.1 to 10 THz; and a pulse inducing element configured to induce an electromagnetic radiation pulse in the gain medium."

For the URL and additional information on this patent, see: Brown, Robert G.; Stanley, James H.. Terahertz Laser. U.S. Patent Number 9551619, filed September 23, 2011, and published online on January 24, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9551619.PN.&OS=PN/9551619RS=PN/9551619

Keywords for this news article include: Electronics, Electromagnet, Semiconductor, Rockwell Collins Inc.
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MAGTERA-NOVEL SPRINTRONIC DEVICE TERAHERTZ MAGNON LASER

My Note: I came across this interesting webpage today, because it's linked to this blog on it's homepage. The following also caught my eye: "we have invented a novel spintronic device that can generate narrow-band, coherent THz pulses, with tunable frequencies at high efficiency and at power output levels on the order of a milliwatt and greater."
http://magtera.com/technology.html


Magtera, Inc. is a privately held Walnut Creek, California based company that has invented and is developing key IP and technology to conquer the last great swath of unoccupied bandwidth in the electromagnetic spectrum - terahertz (THz) spectrum.
The mission of Magtera, Inc. is to enable markets that leverage THz radiation and sensing technologies for security, medical imaging, drug discovery, gene detection, molecular imaging, communication and myriad other applications, and to enable the creation of many more, as yet undiscovered THz-based applications.

Magtera controls the following keys to success:
• Unique enabling technology. Existing THz sources are expensive and inefficient, lack either power or tunability, and none of them can be mass produced on an integrated device. Magtera’s founding inventors conceived of a new device – the Terahertz Magnon Laser, which leverages the quantum magnon laser effect. The Terahertz Magnon Laser is high-power (up to one watt), tunable, compact, capable of large scale production, and can operate at room-temperature.
• Well-developed IP portfolio. The Terahertz Magnon Laser and underlying technology are subject to Magtera’s broad portfolio of patent protection, first filed in 2003 and including eight patents issued in the U.S. and two patents issued in China, with numerous patent applications pending in major markets worldwide.
• Accessible broad market opportunities. Magtera has identified several “killer” applications for its THz technology, such as the portable Terahertz Magnon Laser blood sugar measuring apparatus, which need not pierce the skin. With thirty million diabetics in the U.S. alone, we believe the worldwide market opportunity for such a device is in the scores of billions of dollars.

Meet Magtera Team

Dr. Boris Tankhilevich, Esq.
Main Inventor and Founder
President &CEO
Magtera, Inc
Ph. D. in Theoretical Physics
US Patent Attorney

Prof. Yehiel Korenblit
Co-inventor
Chief Scientist of Magtera, Inc
Professor of Theoretical Physics (retired)
Prof. Korenblit has about 100 published papers in the most
prestigious scientific magazines like "Physics Review",
"Physics Review Letters", etc.

A. Why THz radiation – and why not yet
The terahertz range of frequencies, generally accepted as being within the frequency region between 3 × 1011 to 3 × 1013 Hz (having wavelength in a vacuum from one millimeter to ten microns), presents a new frontier for solid-state electronics and their application. Since THz radiation spectrum exists between microwave spectrum (used in microwave electronics) and infrared spectrum (used in infrared optics), and corresponds to the molecular vibration frequencies in complicated biological objects, the potential and emerging applications of terahertz electronics are myriad and vast. When adequately supplied and sensed, THz radiation can be used as a powerful tool for through-the-wall imaging, since it can penetrate through thick dry wall and other common building materials. It can also be used to detect threatening munitions from across a battlefield, for bio-molecular sensing and biomedical analysis, to detect poisonous and biological substances, in medicine as a sensor for cancer cells and other real-time diagnostics, for environmental monitoring and radio astronomy, and in semiconductor lithography and a host of security- and defense-related applications.
Despite the opportunities, the lack of a high-power, narrow-band, tunable and portable THz source remains the most significant limitation of modern THz systems. The best current commercially available techniques for generation and modulation of THz radiation use ultra-short optical pulses to generate a very rapid change of the conductivity of a semiconductor sample. These techniques allow one to obtain a broadband, pulsed radiation in the THz range, at power levels on the order of microwatts, but without significant tunability; they provide faint, shotgun energy where highly tuned and high power rifle shots are required.
To come at these problems and opportunities from an entirely new direction, we have invented a novel spintronic device that can generate narrow-band, coherent THz pulses, with tunable frequencies at high efficiency and at power output levels on the order of a milliwatt and greater.

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Boris G. Tankhilevich and Y. Korenblit // Magtera, Inc. 536 N. Civic Drive, Walnut Creek, CA (US)