公开(公告)号：US20230154662A1

公开(公告)日：2023-05-18

申请号：US17528937

申请日：2021-11-17

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang ,  Mingrui Li

IPC: H01F10/32

CPC classification number: H01F10/3259

Abstract: Acoustically mediated pulsed radiation sources, phased arrays incorporating the radiation sources, and methods of using the radiation sources and phased arrays to generate electromagnetic radiation via magnetic dipole emission are provided. The radiation sources are based on a superlattice heterostructure that supports in-phase magnetic dipole emission from a series of magnetic insulator layers disposed along the length of the heterostructure.

公开(公告)号：US11199447B1

公开(公告)日：2021-12-14

申请号：US17074756

申请日：2020-10-20

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang

IPC: G01J3/10 ,  H01S1/02 ,  G01J3/453

Abstract: Acoustically mediated spintronic THz emitters based on a stacked, multilayered heterostructure that includes a light-to-acoustic transducer layer, a thermal insulation layer, and a magnetic layer are provided. In the emitters, fast acoustic pulses give rise to long-distance propagation of THz exchange spin waves in a magnetic film. Also provided are THz time-domain spectrometers (THz-TDSs) that incorporate the THz emitters.

公开(公告)号：US20240345338A1

公开(公告)日：2024-10-17

申请号：US18298685

申请日：2023-04-11

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang ,  Chang-Beom Eom

IPC: G02B6/42 ,  H04B10/50

CPC classification number: G02B6/4215 ,  G02B6/4283 ,  H04B10/505

Abstract: Optoelectronic transducers that convert a femtosecond (fs)-timescale laser pulse into an a.c. electrical current pulse with an extremely high frequency and a high quality factor (Q) are provided. Both the frequency and amplitude of the a.c. electrical current pulse can be dynamically tuned by the application of a varying bias magnetic field. The optoelectronic transducers are based on a trilayered freestanding membrane that functions as both an acoustic cavity and a magnon cavity. The freestanding membrane includes an electrical conductor layer, a magnetic insulator layer, and a dielectric layer arranged in a vertical stack.

公开(公告)号：US11817242B2

公开(公告)日：2023-11-14

申请号：US17528937

申请日：2021-11-17

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang ,  Mingrui Li

IPC: H01F10/32 ,  H01F41/30 ,  G01N21/17 ,  G02F1/11 ,  G02B6/293

CPC classification number: H01F10/3259 ,  G01N21/1702 ,  G02B6/29301 ,  G02F1/11 ,  H01F10/3254 ,  H01F41/302 ,  Y10T428/32

Abstract: Acoustically mediated pulsed radiation sources, phased arrays incorporating the radiation sources, and methods of using the radiation sources and phased arrays to generate electromagnetic radiation via magnetic dipole emission are provided. The radiation sources are based on a superlattice heterostructure that supports in-phase magnetic dipole emission from a series of magnetic insulator layers disposed along the length of the heterostructure.

公开(公告)号：US11112355B2

公开(公告)日：2021-09-07

申请号：US16727308

申请日：2019-12-26

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang

IPC: G01J1/42 ,  G01N21/3586

Abstract: Acoustically mediated spintronic THz emitters in which sound waves, rather than direct laser pulses, give rise to a spin current in a magnetic material via magnetoelastic coupling are provided. The THz emitters include a metal layer that acts as a light-to-acoustic transducer. Also provided are THz time-domain spectrometers (THz-TDSs) that incorporate the THz emitters.

公开(公告)号：US20210199571A1

公开(公告)日：2021-07-01

申请号：US16727308

申请日：2019-12-26

Applicant: Wisconsin Alumni Research Foundation

Inventor： Jiamian Hu ,  Shihao Zhuang

IPC: G01N21/3586

Abstract: Acoustically mediated spintronic THz emitters in which sound waves, rather than direct laser pulses, give rise to a spin current in a magnetic material via magnetoelastic coupling are provided. The THz emitters include a metal layer that acts as a light-to-acoustic transducer. Also provided are THz time-domain spectrometers (THz-TDSs) that incorporate the THz emitters.