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Controlling the electro-optic response of a semiconducting perovskite coupled to a phonon-resonant cavity

Light(Science & Applications) 2023年第9期12卷 1749-1756页

作者： Lucia Di Virgilio Jaco J.Geuchies heejae kim Keno Krewer Hai Wang Maksim Grechko Mischa Bonn Max Planck Institute for Polymer Research Ackermannweg 1055128 MainzGermany Pohang University of Science and Technology Department of Physics37673 PohangKorea

Optical cavities,resonant with vibrational or electronic transitions of material within the cavity,enable control of light-matter *** studies have reported cavity-induced modifications of chemical reactivity,fluorescence,phase behavior,and charge ***,we explore the effect of resonant cavity-phonon coupling on the transient photoconductivity in a hybrid organic-inorganic *** this end,we measure the ultrafast photoconductivity response of perovskite in a tunable Fabry–Pérot terahertz cavity,designed to be transparent for optical *** terahertz-cavity field-phonon interaction causes apparent Rabi splitting between the perovskite phonon mode and the cavity *** explore whether the cavity-phonon interaction affects the material’s electron-phonon interaction by determining the charge-carrier mobility through *** the apparent hybridization of cavity and phonon modes,we show that the perovskite properties in both ground(phonon response)and excited(photoconductive response)states remain unaffected by the tunable light-matter *** the response of the integral perovskite-terahertz optical cavity system depends critically on the interaction strength of the cavity with the phonon:the transient terahertz response to optical excitation can be increased up to threefold by tuning the cavity-perovskite interaction *** results enable tunable switches and frequency-controlled induced transparency devices.

关键词： tunable cavity tuning

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Arthroscopic treatment of iliopsoas tendinitis after total hip arthroplasty with acetabular cup malposition: Two case reports

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World Journal of Clinical Cases 2020年第21期8卷 5326-5333页

作者： heejae Won Kwang-Hwan kim Jae-Wook Jung Shin-Yoon kim Seung-Hoon Baek Department of Orthopedic Surgery School of MedicineKyungpook National UniversityKyungpook National University Hospital130 Dongdeok-roJung-GuDaegu 41944South Korea

BACKGROUND Optimal treatment for iliopsoas tendinitis after total hip arthroplasty(THA)with cup malposition,iliopsoas release alone or with cup revision,is controversial,particularly in young,active ***,arthroscopic iliopsoas tendon(IPT)release in these patients has been rarely described,and midterm effects of this procedure on THA longevity and groin pain recurrence remain *** performed arthroscopic IPT release after THA and report midterm outcomes in two young patients with acetabular cup *** SUMMARY In the two patients,groin pain started early after *** examination revealed nonspecific findings,and laboratory tests showed no evidence of *** and computed tomography showed reduced acetabular component anteversion angle and anterior cup prominence of more than 16 *** therapeutic diagnosis,ultrasonography-guided lidocaine with steroid was injected into the IPT *** both patients,groin pain improved initially but worsened after a few ***,the patients underwent arthroscopic IPT release under spinal *** revealed synovitis with fibrous tissues around the IPT and various lesions related to the implants after *** tenotomy and debridement with biopsy were performed;histopathologic studies showed chronic inflammation with synovial *** patients were encouraged to start walking immediately after surgery,and they returned to complete daily function early after *** experienced no recurrence of groin pain or any implant-related problems 5 years *** Arthroscopic IPT release for cup malposition produced excellent midterm outcomes without recurrence of groin pain and implant-related problems.

关键词： Iliopsoas tendinitis Total hip arthroplasty Cup malposition Arthroscopy Tenotomy Case report

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Surgical strategy of the treatment of atypical femoral fractures

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World Journal of Orthopedics 2023年第5期14卷 302-311页

作者： Bum-Jin Shim heejae Won Shin-Yoon kim Seung-Hoon Baek Department of Orthopedic Surgery Kyungpook National University Chilgok HospitalDaegu 41404South Korea Department of Orthopedic Surgery Kyungpook National UniversityCollege of MedincineDaegu 41944South Korea Department of Orthopedic Surgery Kyungpook National University HospitalKyungpook National UniversityCollege of MedincineDaegu 41944South Korea

The atypical femoral fracture(AFF)has been attracting significant attention because of its increasing incidence;additionally,its treatment is challenging from biological and mechanical *** surgery is often required to manage complete AFFs,clear guidelines for the surgical treatment of AFFs are currently *** reviewed and described the surgical treatment of AFFs and the surveillance of the contralateral *** complete AFFs,cephalomedullary intramedullary nailing spanning the entire length of the femur can be *** surgical techniques to overcome the femoral bowing common in AFFs include a lateral entry point,external rotation of the nail,and the use of a nail with a small radius of curvature,or a contralateral *** the case of a narrow medullary canal,severe femoral bowing,or pre-existing implants,plate fixation may be considered as an *** incomplete AFFs,prophylactic fixation depends on several risk factors,such as a subtrochanteric location,presence of a radiolucent line,functional pain,and condition of the contralateral femur;the same surgical principles as those in complete AFFs can be ***,once AFF is diagnosed,clinicians should recognize the increased risk of contralateral AFFs,and close surveillance of the contralateral femur is recommended.

关键词： Atypical femoral fracture Surgical treatment Surveillance Contralateral femur Femoral bowing

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Does proximal femoral nail antirotation achieve better outcome than previous-generation proximal femoral nail?

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World Journal of Orthopedics 2020年第11期11卷 483-491页

作者： Seung-Hoon Baek Seunggil Baek heejae Won Jee-Wook Yoon Chul-Hee Jung Shin-Yoon kim Department of Orthopedic Surgery Kyungpook National University HospitalDaegu 41944South Korea Department of Orthopedic Surgery School of MedicineKyungpook National UniversityDaegu 41944South Korea Department of Orthopedic Surgery Goodssen HospitalDaegu 42010South Korea

BACKGROUND There are few studies in the literature comparing the clinical outcomes and radiographic results of proximal femoral nail(PFN)and proximal femoral nail antirotation(PFNA)for pertrochanteric femoral fracture(PFF)in elderly *** To evaluate both clinical and radiographic outcomes after fixation with PFN and PFNA in an elderly patient *** One hundred fifty-eight patients older than 65 years with PFF who underwent fixation with either PFN or PFNA were ***-three patients underwent fixation with PFN,whereas 85 were fixed with *** mean follow-up was 2.4 years(range,1-7 years).Clinical outcome was measured in terms of operation time,postoperative function at each follow-up visit,and mortality within one *** evaluation included reduction quality after surgery,Cleveland Index,tip-apex distance(TAD),union rate,time to union,and sliding distance of the screw or *** including nonunion,screw cutout,infection,osteonecrosis of the femoral head,and implant breakage were also *** Postoperative function was more satisfactory in patients who underwent PFNA than in those who underwent PFN(P=0.033).Radiologically,the sliding difference was greater in PFN than in PFNA patients(6.1 and 3.2 mm,respectively,P=0.036).The rate of screw cutout was higher in the PFN group;eight for PFN(11.0%)and two for PFNA patients(2.4%,P=0.027).There were no differences between the two groups in terms of operation time,mortality rate at one year after the operation,adequacy of reduction,Cleveland Index,TAD,union rate,time to union,nonunion,infection,osteonecrosis,or implant *** Elderly patients with PFF who underwent PFNA using a helical blade demonstrated better clinical and radiographic outcomes as measured by clinical score and sliding distance compared with patients who underwent PFN.

关键词： Pertrochanteric fracture Proximal femoral nail Proximal femoral nail antirotation Sliding distance Cutout Outcome

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