中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

6 records (took 0.024 seconds)

    Forward-Biased Modulator for Cryogenic Optical Readout
    3.
    发明申请
    Forward-Biased Modulator for Cryogenic Optical Readout 有权

    公开(公告)号：US20210208470A1

    公开(公告)日：2021-07-08

    申请号：US17091905

    申请日：2020-11-06

    Applicant: Rajeev J. RAM ,  Dodd Joseph GRAY ,  Amir H. Atabaki ,  Marc De Cea Falco

    Inventor： Rajeev J. RAM ,  Dodd Joseph GRAY ,  Amir H. Atabaki ,  Marc De Cea Falco

    IPC: G02F1/225 ,  G02F1/21 ,  G02F1/01

    Abstract: Optical read-out of a cryogenic device (such as a superconducting logic or detector element) can be performed with a forward-biased optical modulator that is directly coupled to the cryogenic device without any intervening electrical amplifier. Forward-biasing at cryogenic temperatures enables very high modulation efficiency (1,000-10,000 pm/V) of the optical modulator, and allows for optical modulation with millivolt driving signals and microwatt power dissipation in the cryogenic environment. Modulated optical signals can be coupled out of the cryostat via an optical fiber, reducing the thermal load on the cryostat. Using optical fiber instead of electrical wires can increase the communication bandwidth between the cryogenic environment and room-temperature environment to bandwidth densities as high as Tbps/mm2 using wavelength division multiplexing. Sensitive optical signals having higher robustness to noise and crosstalk, because of their immunity to electromagnetic interference, can be carried by the optical fiber.

    Phonon-recyling light-emitting diodes
    5.
    发明授权
    Phonon-recyling light-emitting diodes 有权
    声子再生发光二极管

    公开(公告)号：US09557215B2

    公开(公告)日：2017-01-31

    申请号：US13969225

    申请日：2013-08-16

    Applicant: Parthiban Santhanam ,  Dodd Joseph Gray ,  Rajeev Jagga Ram

    Inventor： Parthiban Santhanam ,  Dodd Joseph Gray ,  Rajeev Jagga Ram

    IPC: G01J3/02 ,  H01L33/00 ,  F21V3/02 ,  G01J3/10 ,  G01J3/42 ,  F21Y101/00

    CPC classification number: G01J3/0216 ,  F21K9/20 ,  F21V3/02 ,  F21Y2101/00 ,  F21Y2115/10 ,  G01J3/108 ,  G01J3/42 ,  H01L33/0004

    Abstract: Contrary to conventional wisdom, which holds that light-emitting diodes (LEDs) should be cooled to increase efficiency, the LEDs disclosed herein are heated to increase efficiency. Heating an LED operating at low forward bias voltage can be accomplished by injecting phonons generated by non-radiative recombination back into the LED's semiconductor lattice. This raises the temperature of the LED's active rejection, resulting in thermally assisted injection of holes and carriers into the LED's active region. This phonon recycling or thermo-electric pumping process can be promoted by heating the LED with an external source (e.g., exhaust gases or waste heat from other electrical components). It can also be achieved via internal heat generation, e.g., by thermally insulating the LED's diode structure to prevent (rather than promote) heat dissipation. In other words, trapping heat generated by the LED within the LED increases LED efficiency under certain bias conditions.

    Abstract translation: 与传统观念相反，认为应该将发光二极管（LED）冷却以提高效率，因此本文公开的LED被加热以提高效率。 加热在低正向偏压下工作的LED可以通过将非辐射复合产生的声子注入到LED的半导体晶格中来实现。 这提高了LED的主动抑制的温度，导致热辅助将空穴和载体注入LED的有源区域。 可以通过用外部源（例如来自其他电气部件的废气或废热）加热LED来促进该声子再循环或热电泵送过程。 也可以通过内部发热来实现，例如通过将LED的二极管结构隔热来防止（而不是促进）散热。 换句话说，LED内的LED产生的热量会在某些偏压条件下提高LED的效率。

Patent Agency Ranking